90699609 has 32 divisors (see below), whose sum is σ = 162376704. Its totient is φ = 43490880.

The previous prime is 90699601. The next prime is 90699611.

90699609 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90699609 - 2³ = 90699601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90699601) 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, 12099 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (5074272).

Almost surely, 2^90699609 is an apocalyptic number.

It is an amenable number.

90699609 is a deficient number, since it is larger than the sum of its proper divisors (71677095).

90699609 is a wasteful number, since it uses less digits than its factorization.

90699609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30237.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 90699609 is about 9523.6342327916. The cubic root of 90699609 is about 449.2986754555.

The spelling of 90699609 in words is "ninety million, six hundred ninety-nine thousand, six hundred nine".