155690053 has 2 divisors, whose sum is σ = 155690054. Its totient is φ = 155690052.

The previous prime is 155690039. The next prime is 155690099. The reversal of 155690053 is 350096551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153710404 + 1979649 = 12398^2 + 1407^2 .

It is a cyclic number.

It is not a de Polignac number, because 155690053 - 2²⁵ = 122135621 is a prime.

It is a super-3 number, since 3×155690053³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155690023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77845026 + 77845027.

It is an arithmetic number, because the mean of its divisors is an integer number (77845027).

Almost surely, 2^155690053 is an apocalyptic number.

It is an amenable number.

155690053 is a deficient number, since it is larger than the sum of its proper divisors (1).

155690053 is an equidigital number, since it uses as much as digits as its factorization.

155690053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 155690053 is about 12477.5820173622. The cubic root of 155690053 is about 537.9645054733.

The spelling of 155690053 in words is "one hundred fifty-five million, six hundred ninety thousand, fifty-three".