90972871 has 8 divisors (see below), whose sum is σ = 101355264. Its totient is φ = 80942520.

The previous prime is 90972839. The next prime is 90972881. The reversal of 90972871 is 17827909.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90972871 - 2⁵ = 90972839 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 (90972881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87465 + ... + 88498.

It is an arithmetic number, because the mean of its divisors is an integer number (12669408).

Almost surely, 2^90972871 is an apocalyptic number.

90972871 is a deficient number, since it is larger than the sum of its proper divisors (10382393).

90972871 is a wasteful number, since it uses less digits than its factorization.

90972871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176021.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 90972871 is about 9537.9699622089. The cubic root of 90972871 is about 449.7494424098.

The spelling of 90972871 in words is "ninety million, nine hundred seventy-two thousand, eight hundred seventy-one".