90699971 has 8 divisors (see below), whose sum is σ = 95391744. Its totient is φ = 86070600.

The previous prime is 90699967. The next prime is 90699991. The reversal of 90699971 is 17999609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90699971 - 2² = 90699967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90699911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12605 + ... + 18446.

It is an arithmetic number, because the mean of its divisors is an integer number (11923968).

Almost surely, 2^90699971 is an apocalyptic number.

90699971 is a deficient number, since it is larger than the sum of its proper divisors (4691773).

90699971 is a wasteful number, since it uses less digits than its factorization.

90699971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31201.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 90699971 is about 9523.6532381224. The cubic root of 90699971 is about 449.2992732012.

The spelling of 90699971 in words is "ninety million, six hundred ninety-nine thousand, nine hundred seventy-one".