90927779 has 4 divisors (see below), whose sum is σ = 91273776. Its totient is φ = 90581784.

The previous prime is 90927769. The next prime is 90927827. The reversal of 90927779 is 97772909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97772909 = 13 ⋅7520993.

It is a cyclic number.

It is not a de Polignac number, because 90927779 - 2¹⁶ = 90862243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90927719) 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, 172604 + ... + 173129.

It is an arithmetic number, because the mean of its divisors is an integer number (22818444).

Almost surely, 2^90927779 is an apocalyptic number.

90927779 is a deficient number, since it is larger than the sum of its proper divisors (345997).

90927779 is a wasteful number, since it uses less digits than its factorization.

90927779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345996.

The product of its (nonzero) digits is 500094, while the sum is 50.

The square root of 90927779 is about 9535.6058538511. The cubic root of 90927779 is about 449.6751218889.

The spelling of 90927779 in words is "ninety million, nine hundred twenty-seven thousand, seven hundred seventy-nine".