90609155 has 32 divisors (see below), whose sum is σ = 135268224. Its totient is φ = 56733696.

The previous prime is 90609151. The next prime is 90609179. The reversal of 90609155 is 55190609.

It is a cyclic number.

It is not a de Polignac number, because 90609155 - 2² = 90609151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (90609151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43109 + ... + 45161.

It is an arithmetic number, because the mean of its divisors is an integer number (4227132).

Almost surely, 2^90609155 is an apocalyptic number.

90609155 is a deficient number, since it is larger than the sum of its proper divisors (44659069).

90609155 is a wasteful number, since it uses less digits than its factorization.

90609155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 90609155 is about 9518.8841257786. The cubic root of 90609155 is about 449.1492651085.

The spelling of 90609155 in words is "ninety million, six hundred nine thousand, one hundred fifty-five".