73939398724 has 27 divisors (see below), whose sum is σ = 131128772061. Its totient is φ = 36480518880.

The previous prime is 73939398713. The next prime is 73939398727. The reversal of 73939398724 is 42789393937.

The square root of 73939398724 is 271918.

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

It can be written as a sum of positive squares in only one way, i.e., 54607277124 + 19332121600 = 233682^2 + 139040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73939398727) 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, 42962184 + ... + 42963904.

Almost surely, 2^73939398724 is an apocalyptic number.

73939398724 is the 271918-th square number.

It is an amenable number.

73939398724 is a deficient number, since it is larger than the sum of its proper divisors (57189373337).

73939398724 is an frugal number, since it uses more digits than its factorization.

73939398724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604 (or 1802 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 64.

Multiplying 73939398724 by its sum of digits (64), we get a square (4732121518336 = 2175344²).

The spelling of 73939398724 in words is "seventy-three billion, nine hundred thirty-nine million, three hundred ninety-eight thousand, seven hundred twenty-four".