90528779 has 16 divisors (see below), whose sum is σ = 101818080. Its totient is φ = 79776000.

The previous prime is 90528761. The next prime is 90528797. The reversal of 90528779 is 97782509.

It is an interprime number because it is at equal distance from previous prime (90528761) and next prime (90528797).

It is a cyclic number.

It is not a de Polignac number, because 90528779 - 2⁸ = 90528523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90528709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81077 + ... + 82185.

It is an arithmetic number, because the mean of its divisors is an integer number (6363630).

Almost surely, 2^90528779 is an apocalyptic number.

90528779 is a deficient number, since it is larger than the sum of its proper divisors (11289301).

90528779 is a wasteful number, since it uses less digits than its factorization.

90528779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 90528779 is about 9514.6612656468. The cubic root of 90528779 is about 449.0164179690.

The spelling of 90528779 in words is "ninety million, five hundred twenty-eight thousand, seven hundred seventy-nine".