155393089 has 2 divisors, whose sum is σ = 155393090. Its totient is φ = 155393088.

The previous prime is 155393041. The next prime is 155393093. The reversal of 155393089 is 980393551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130142464 + 25250625 = 11408^2 + 5025^2 .

It is a cyclic number.

It is not a de Polignac number, because 155393089 - 2¹³ = 155384897 is a prime.

It is not a weakly prime, because it can be changed into another prime (155393389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77696544 + 77696545.

It is an arithmetic number, because the mean of its divisors is an integer number (77696545).

Almost surely, 2^155393089 is an apocalyptic number.

It is an amenable number.

155393089 is a deficient number, since it is larger than the sum of its proper divisors (1).

155393089 is an equidigital number, since it uses as much as digits as its factorization.

155393089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 155393089 is about 12465.6764357174. The cubic root of 155393089 is about 537.6222490279.

The spelling of 155393089 in words is "one hundred fifty-five million, three hundred ninety-three thousand, eighty-nine".