154338949 has 4 divisors (see below), whose sum is σ = 154364364. Its totient is φ = 154313536.

The previous prime is 154338941. The next prime is 154338979. The reversal of 154338949 is 949833451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 949833451 = 7 ⋅135690493.

It can be written as a sum of positive squares in 2 ways, for example, as 120780100 + 33558849 = 10990^2 + 5793^2 .

It is a cyclic number.

It is not a de Polignac number, because 154338949 - 2³ = 154338941 is a prime.

It is a super-2 number, since 2×154338949² = 47641022356849202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154338899 and 154338908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154338941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349 + ... + 17725.

It is an arithmetic number, because the mean of its divisors is an integer number (38591091).

Almost surely, 2^154338949 is an apocalyptic number.

It is an amenable number.

154338949 is a deficient number, since it is larger than the sum of its proper divisors (25415).

154338949 is a wasteful number, since it uses less digits than its factorization.

154338949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25414.

The product of its digits is 466560, while the sum is 46.

The square root of 154338949 is about 12423.3227841830. The cubic root of 154338949 is about 536.4038004266.

The spelling of 154338949 in words is "one hundred fifty-four million, three hundred thirty-eight thousand, nine hundred forty-nine".