90521963 has 12 divisors (see below), whose sum is σ = 108933840. Its totient is φ = 74913552.

The previous prime is 90521929. The next prime is 90521983. The reversal of 90521963 is 36912509.

It is not a de Polignac number, because 90521963 - 2²⁶ = 23413099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90521903) 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 11 ways as a sum of consecutive naturals, for example, 30431 + ... + 33272.

It is an arithmetic number, because the mean of its divisors is an integer number (9077820).

Almost surely, 2^90521963 is an apocalyptic number.

90521963 is a deficient number, since it is larger than the sum of its proper divisors (18411877).

90521963 is a wasteful number, since it uses less digits than its factorization.

90521963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63746 (or 63739 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 90521963 is about 9514.3030748447. The cubic root of 90521963 is about 449.0051487249.

The spelling of 90521963 in words is "ninety million, five hundred twenty-one thousand, nine hundred sixty-three".