90779 has 4 divisors (see below), whose sum is σ = 97776. Its totient is φ = 83784.

The previous prime is 90749. The next prime is 90787. The reversal of 90779 is 97709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97709 = 199 ⋅491.

It is a cyclic number.

It is not a de Polignac number, because 90779 - 2⁸ = 90523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90709) 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, 3479 + ... + 3504.

It is an arithmetic number, because the mean of its divisors is an integer number (24444).

2⁹⁰⁷⁷⁹ is an apocalyptic number.

90779 is a deficient number, since it is larger than the sum of its proper divisors (6997).

90779 is a wasteful number, since it uses less digits than its factorization.

90779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 90779 is about 301.2955359776. The cubic root of 90779 is about 44.9429730297.

The spelling of 90779 in words is "ninety thousand, seven hundred seventy-nine".