90469809 has 12 divisors (see below), whose sum is σ = 130764816. Its totient is φ = 60273432.

The previous prime is 90469793. The next prime is 90469823. The reversal of 90469809 is 90896409.

It is not a de Polignac number, because 90469809 - 2⁴ = 90469793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90469829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18982 + ... + 23264.

It is an arithmetic number, because the mean of its divisors is an integer number (10897068).

Almost surely, 2^90469809 is an apocalyptic number.

It is an amenable number.

90469809 is a deficient number, since it is larger than the sum of its proper divisors (40295007).

90469809 is a wasteful number, since it uses less digits than its factorization.

90469809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636 (or 6633 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 90469809 is about 9511.5618591270. The cubic root of 90469809 is about 448.9189010988.

The spelling of 90469809 in words is "ninety million, four hundred sixty-nine thousand, eight hundred nine".