90836779 has 4 divisors (see below), whose sum is σ = 99094680. Its totient is φ = 82578880.

The previous prime is 90836773. The next prime is 90836819. The reversal of 90836779 is 97763809.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90836779 - 2⁷ = 90836651 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90836773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4128934 + ... + 4128955.

It is an arithmetic number, because the mean of its divisors is an integer number (24773670).

Almost surely, 2^90836779 is an apocalyptic number.

90836779 is a deficient number, since it is larger than the sum of its proper divisors (8257901).

90836779 is a wasteful number, since it uses less digits than its factorization.

90836779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8257900.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 90836779 is about 9530.8330695695. The cubic root of 90836779 is about 449.5250610563.

The spelling of 90836779 in words is "ninety million, eight hundred thirty-six thousand, seven hundred seventy-nine".