155801089 has 2 divisors, whose sum is σ = 155801090. Its totient is φ = 155801088.

The previous prime is 155801081. The next prime is 155801101. The reversal of 155801089 is 980108551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147865600 + 7935489 = 12160^2 + 2817^2 .

It is a cyclic number.

It is not a de Polignac number, because 155801089 - 2³ = 155801081 is a prime.

It is not a weakly prime, because it can be changed into another prime (155801081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77900544 + 77900545.

It is an arithmetic number, because the mean of its divisors is an integer number (77900545).

Almost surely, 2^155801089 is an apocalyptic number.

It is an amenable number.

155801089 is a deficient number, since it is larger than the sum of its proper divisors (1).

155801089 is an equidigital number, since it uses as much as digits as its factorization.

155801089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 155801089 is about 12482.0306440899. The cubic root of 155801089 is about 538.0923647059.

The spelling of 155801089 in words is "one hundred fifty-five million, eight hundred one thousand, eighty-nine".