90772879 has 2 divisors, whose sum is σ = 90772880. Its totient is φ = 90772878.

The previous prime is 90772831. The next prime is 90772883. The reversal of 90772879 is 97827709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90772879 - 2⁷ = 90772751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90776879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45386439 + 45386440.

It is an arithmetic number, because the mean of its divisors is an integer number (45386440).

Almost surely, 2^90772879 is an apocalyptic number.

90772879 is a deficient number, since it is larger than the sum of its proper divisors (1).

90772879 is an equidigital number, since it uses as much as digits as its factorization.

90772879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 90772879 is about 9527.4802020261. The cubic root of 90772879 is about 449.4196287637.

The spelling of 90772879 in words is "ninety million, seven hundred seventy-two thousand, eight hundred seventy-nine".