154979431 has 2 divisors, whose sum is σ = 154979432. Its totient is φ = 154979430.

The previous prime is 154979417. The next prime is 154979437. The reversal of 154979431 is 134979451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 154979431 - 2²³ = 146590823 is a prime.

It is a super-2 number, since 2×154979431² = 48037248066167522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154979437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77489715 + 77489716.

It is an arithmetic number, because the mean of its divisors is an integer number (77489716).

Almost surely, 2^154979431 is an apocalyptic number.

154979431 is a deficient number, since it is larger than the sum of its proper divisors (1).

154979431 is an equidigital number, since it uses as much as digits as its factorization.

154979431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 154979431 is about 12449.0734996625. The cubic root of 154979431 is about 537.1447731108.

The spelling of 154979431 in words is "one hundred fifty-four million, nine hundred seventy-nine thousand, four hundred thirty-one".