90431677 has 4 divisors (see below), whose sum is σ = 103350496. Its totient is φ = 77512860.

The previous prime is 90431641. The next prime is 90431717. The reversal of 90431677 is 77613409.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77613409 = 43 ⋅1804963.

It is a cyclic number.

It is not a de Polignac number, because 90431677 - 2²³ = 82043069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90431477) 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, 6459399 + ... + 6459412.

It is an arithmetic number, because the mean of its divisors is an integer number (25837624).

Almost surely, 2^90431677 is an apocalyptic number.

It is an amenable number.

90431677 is a deficient number, since it is larger than the sum of its proper divisors (12918819).

90431677 is a wasteful number, since it uses less digits than its factorization.

90431677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12918818.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 90431677 is about 9509.5571400565. The cubic root of 90431677 is about 448.8558208244.

The spelling of 90431677 in words is "ninety million, four hundred thirty-one thousand, six hundred seventy-seven".