90607881 has 16 divisors (see below), whose sum is σ = 148690304. Its totient is φ = 47793024.

The previous prime is 90607873. The next prime is 90607883. The reversal of 90607881 is 18870609.

It is not a de Polignac number, because 90607881 - 2³ = 90607873 is a prime.

It is a super-2 number, since 2×90607881² = 16419576198620322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (90607883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165676 + ... + 166221.

It is an arithmetic number, because the mean of its divisors is an integer number (9293144).

Almost surely, 2^90607881 is an apocalyptic number.

90607881 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

90607881 is a deficient number, since it is larger than the sum of its proper divisors (58082423).

90607881 is a wasteful number, since it uses less digits than its factorization.

90607881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331920.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 90607881 is about 9518.8172059348. The cubic root of 90607881 is about 449.1471600275.

The spelling of 90607881 in words is "ninety million, six hundred seven thousand, eight hundred eighty-one".