155504957 has 2 divisors, whose sum is σ = 155504958. Its totient is φ = 155504956.

The previous prime is 155504941. The next prime is 155505011. The reversal of 155504957 is 759405551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154604356 + 900601 = 12434^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 155504957 - 2⁴ = 155504941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155504057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77752478 + 77752479.

It is an arithmetic number, because the mean of its divisors is an integer number (77752479).

Almost surely, 2^155504957 is an apocalyptic number.

It is an amenable number.

155504957 is a deficient number, since it is larger than the sum of its proper divisors (1).

155504957 is an equidigital number, since it uses as much as digits as its factorization.

155504957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157500, while the sum is 41.

The square root of 155504957 is about 12470.1626693480. The cubic root of 155504957 is about 537.7512300948.

The spelling of 155504957 in words is "one hundred fifty-five million, five hundred four thousand, nine hundred fifty-seven".