155900887 has 4 divisors (see below), whose sum is σ = 155957776. Its totient is φ = 155844000.

The previous prime is 155900881. The next prime is 155900971. The reversal of 155900887 is 788009551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155900887 - 2¹¹ = 155898839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155900881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24114 + ... + 29887.

It is an arithmetic number, because the mean of its divisors is an integer number (38989444).

Almost surely, 2^155900887 is an apocalyptic number.

155900887 is a deficient number, since it is larger than the sum of its proper divisors (56889).

155900887 is an equidigital number, since it uses as much as digits as its factorization.

155900887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56888.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 155900887 is about 12486.0276709608. The cubic root of 155900887 is about 538.2072314254.

The spelling of 155900887 in words is "one hundred fifty-five million, nine hundred thousand, eight hundred eighty-seven".