90395881 has 4 divisors (see below), whose sum is σ = 91485072. Its totient is φ = 89306692.

The previous prime is 90395873. The next prime is 90395891. The reversal of 90395881 is 18859309.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90395881 - 2³ = 90395873 is a prime.

It is a super-2 number, since 2×90395881² = 16342830603532322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90395801) 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, 544471 + ... + 544636.

It is an arithmetic number, because the mean of its divisors is an integer number (22871268).

Almost surely, 2^90395881 is an apocalyptic number.

It is an amenable number.

90395881 is a deficient number, since it is larger than the sum of its proper divisors (1089191).

90395881 is a wasteful number, since it uses less digits than its factorization.

90395881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089190.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 90395881 is about 9507.6748471958. The cubic root of 90395881 is about 448.7965887649.

The spelling of 90395881 in words is "ninety million, three hundred ninety-five thousand, eight hundred eighty-one".