154623949 has 4 divisors (see below), whose sum is σ = 157541436. Its totient is φ = 151706464.

The previous prime is 154623947. The next prime is 154623967. The reversal of 154623949 is 949326451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949326451 = 997 ⋅952183.

It can be written as a sum of positive squares in 2 ways, for example, as 142324900 + 12299049 = 11930^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 154623949 - 2¹ = 154623947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154623941) 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, 1458664 + ... + 1458769.

It is an arithmetic number, because the mean of its divisors is an integer number (39385359).

Almost surely, 2^154623949 is an apocalyptic number.

It is an amenable number.

154623949 is a deficient number, since it is larger than the sum of its proper divisors (2917487).

154623949 is an equidigital number, since it uses as much as digits as its factorization.

154623949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917486.

The product of its digits is 233280, while the sum is 43.

The square root of 154623949 is about 12434.7878550460. The cubic root of 154623949 is about 536.7337691557.

The spelling of 154623949 in words is "one hundred fifty-four million, six hundred twenty-three thousand, nine hundred forty-nine".