93640521 has 16 divisors (see below), whose sum is σ = 140305536. Its totient is φ = 55118976.

The previous prime is 93640499. The next prime is 93640537. The reversal of 93640521 is 12504639.

It is not a de Polignac number, because 93640521 - 2⁶ = 93640457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (93640571) 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, 51300 + ... + 53093.

It is an arithmetic number, because the mean of its divisors is an integer number (8769096).

Almost surely, 2^93640521 is an apocalyptic number.

It is an amenable number.

93640521 is a deficient number, since it is larger than the sum of its proper divisors (46665015).

93640521 is a wasteful number, since it uses less digits than its factorization.

93640521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104432.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 93640521 is about 9676.8032428070. The cubic root of 93640521 is about 454.1032468450.

The spelling of 93640521 in words is "ninety-three million, six hundred forty thousand, five hundred twenty-one".