93918344521 has 9 divisors (see below), whose sum is σ = 96166779501. Its totient is φ = 91721325612.

The previous prime is 93918344519. The next prime is 93918344539. The reversal of 93918344521 is 12544381939.

The square root of 93918344521 is 306461.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 93918344521 - 2¹ = 93918344519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93918344581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13174260 + ... + 13181386.

Almost surely, 2^93918344521 is an apocalyptic number.

93918344521 is the 306461-st square number.

93918344521 is the 153231-st centered octagonal number.

It is an amenable number.

93918344521 is a deficient number, since it is larger than the sum of its proper divisors (2248434980).

93918344521 is an frugal number, since it uses more digits than its factorization.

93918344521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14340 (or 7170 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

Multiplying 93918344521 by its sum of digits (49), we get a square (4601998881529 = 2145227²).

The spelling of 93918344521 in words is "ninety-three billion, nine hundred eighteen million, three hundred forty-four thousand, five hundred twenty-one".