90979854 has 32 divisors (see below), whose sum is σ = 214665216. Its totient is φ = 25155360.

The previous prime is 90979843. The next prime is 90979871. The reversal of 90979854 is 45897909.

It is a happy number.

It is a super-2 number, since 2×90979854² = 16554667667722632, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90979797 and 90979806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33637 + ... + 36240.

It is an arithmetic number, because the mean of its divisors is an integer number (6708288).

Almost surely, 2^90979854 is an apocalyptic number.

90979854 is an abundant number, since it is smaller than the sum of its proper divisors (123685362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90979854 is a wasteful number, since it uses less digits than its factorization.

90979854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69920.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 90979854 is about 9538.3360184049. The cubic root of 90979854 is about 449.7609495766.

The spelling of 90979854 in words is "ninety million, nine hundred seventy-nine thousand, eight hundred fifty-four".