90469881 has 6 divisors (see below), whose sum is σ = 130678730. Its totient is φ = 60313248.

The previous prime is 90469871. The next prime is 90469889. The reversal of 90469881 is 18896409.

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 31809600 = 7659^2 + 5640^2 .

It is not a de Polignac number, because 90469881 - 2¹¹ = 90467833 is a prime.

It is a super-2 number, since 2×90469881² = 16369598736308322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90469889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5026096 + ... + 5026113.

Almost surely, 2^90469881 is an apocalyptic number.

It is an amenable number.

90469881 is a deficient number, since it is larger than the sum of its proper divisors (40208849).

90469881 is a wasteful number, since it uses less digits than its factorization.

90469881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052215 (or 10052212 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 90469881 is about 9511.5656439936. The cubic root of 90469881 is about 448.9190201888.

The spelling of 90469881 in words is "ninety million, four hundred sixty-nine thousand, eight hundred eighty-one".