90520845 has 16 divisors (see below), whose sum is σ = 152456640. Its totient is φ = 45736704.

The previous prime is 90520813. The next prime is 90520853. The reversal of 90520845 is 54802509.

It is not a de Polignac number, because 90520845 - 2⁵ = 90520813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158524 + ... + 159093.

It is an arithmetic number, because the mean of its divisors is an integer number (9528540).

Almost surely, 2^90520845 is an apocalyptic number.

90520845 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90520845 is a deficient number, since it is larger than the sum of its proper divisors (61935795).

90520845 is a wasteful number, since it uses less digits than its factorization.

90520845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317644.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 90520845 is about 9514.2443210168. The cubic root of 90520845 is about 449.0033002239.

The spelling of 90520845 in words is "ninety million, five hundred twenty thousand, eight hundred forty-five".