90442971 has 6 divisors (see below), whose sum is σ = 130639860. Its totient is φ = 60295308.

The previous prime is 90442949. The next prime is 90442981. The reversal of 90442971 is 17924409.

It is not a de Polignac number, because 90442971 - 2⁵ = 90442939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90442981) 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 5 ways as a sum of consecutive naturals, for example, 5024601 + ... + 5024618.

It is an arithmetic number, because the mean of its divisors is an integer number (21773310).

Almost surely, 2^90442971 is an apocalyptic number.

90442971 is a deficient number, since it is larger than the sum of its proper divisors (40196889).

90442971 is a wasteful number, since it uses less digits than its factorization.

90442971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10049225 (or 10049222 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90442971 is about 9510.1509451743. The cubic root of 90442971 is about 448.8745058943.

The spelling of 90442971 in words is "ninety million, four hundred forty-two thousand, nine hundred seventy-one".