90521079 has 16 divisors (see below), whose sum is σ = 133029120. Its totient is φ = 54293760.

The previous prime is 90521051. The next prime is 90521083. The reversal of 90521079 is 97012509.

It is not a de Polignac number, because 90521079 - 2⁹ = 90520567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90521009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10939 + ... + 17340.

It is an arithmetic number, because the mean of its divisors is an integer number (8314320).

Almost surely, 2^90521079 is an apocalyptic number.

90521079 is a deficient number, since it is larger than the sum of its proper divisors (42508041).

90521079 is a wasteful number, since it uses less digits than its factorization.

90521079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28390.

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 90521079 is about 9514.2566183596. The cubic root of 90521079 is about 449.0036871207.

The spelling of 90521079 in words is "ninety million, five hundred twenty-one thousand, seventy-nine".