155953879 has 2 divisors, whose sum is σ = 155953880. Its totient is φ = 155953878.

The previous prime is 155953877. The next prime is 155953921. The reversal of 155953879 is 978359551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155953879 - 2¹ = 155953877 is a prime.

It is a super-2 number, since 2×155953879² = 48643224750293282, which contains 22 as substring.

Together with 155953877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155953871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77976939 + 77976940.

It is an arithmetic number, because the mean of its divisors is an integer number (77976940).

Almost surely, 2^155953879 is an apocalyptic number.

155953879 is a deficient number, since it is larger than the sum of its proper divisors (1).

155953879 is an equidigital number, since it uses as much as digits as its factorization.

155953879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701000, while the sum is 52.

The square root of 155953879 is about 12488.1495426664. The cubic root of 155953879 is about 538.2682048795.

The spelling of 155953879 in words is "one hundred fifty-five million, nine hundred fifty-three thousand, eight hundred seventy-nine".