154990149 has 4 divisors (see below), whose sum is σ = 206653536. Its totient is φ = 103326764.

The previous prime is 154990097. The next prime is 154990153. The reversal of 154990149 is 941099451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941099451 = 3 ⋅313699817.

It is a cyclic number.

It is not a de Polignac number, because 154990149 - 2¹² = 154986053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 154990149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154990159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25831689 + ... + 25831694.

It is an arithmetic number, because the mean of its divisors is an integer number (51663384).

Almost surely, 2^154990149 is an apocalyptic number.

It is an amenable number.

154990149 is a deficient number, since it is larger than the sum of its proper divisors (51663387).

154990149 is an equidigital number, since it uses as much as digits as its factorization.

154990149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51663386.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 154990149 is about 12449.5039660221. The cubic root of 154990149 is about 537.1571553668.

The spelling of 154990149 in words is "one hundred fifty-four million, nine hundred ninety thousand, one hundred forty-nine".