90053979 has 8 divisors (see below), whose sum is σ = 120256272. Its totient is φ = 59943840.

The previous prime is 90053969. The next prime is 90053983. The reversal of 90053979 is 97935009.

It is a happy number.

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

It is not a de Polignac number, because 90053979 - 2²⁰ = 89005403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90053979.

It is not an unprimeable number, because it can be changed into a prime (90053959) 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, 20724 + ... + 24689.

It is an arithmetic number, because the mean of its divisors is an integer number (15032034).

Almost surely, 2^90053979 is an apocalyptic number.

90053979 is a deficient number, since it is larger than the sum of its proper divisors (30202293).

90053979 is a wasteful number, since it uses less digits than its factorization.

90053979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46077.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 90053979 is about 9489.6774971545. The cubic root of 90053979 is about 448.2300499896.

The spelling of 90053979 in words is "ninety million, fifty-three thousand, nine hundred seventy-nine".