90959091 has 4 divisors (see below), whose sum is σ = 121278792. Its totient is φ = 60639392.

The previous prime is 90959059. The next prime is 90959093. The reversal of 90959091 is 19095909.

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 90959091 - 2⁵ = 90959059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90959093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15159846 + ... + 15159851.

It is an arithmetic number, because the mean of its divisors is an integer number (30319698).

Almost surely, 2^90959091 is an apocalyptic number.

90959091 is a deficient number, since it is larger than the sum of its proper divisors (30319701).

90959091 is a wasteful number, since it uses less digits than its factorization.

90959091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30319700.

The product of its (nonzero) digits is 32805, while the sum is 42.

The square root of 90959091 is about 9537.2475589134. The cubic root of 90959091 is about 449.7267328547.

The spelling of 90959091 in words is "ninety million, nine hundred fifty-nine thousand, ninety-one".