131709474724 has 9 divisors (see below), whose sum is σ = 230492850987. Its totient is φ = 65854374444.

The previous prime is 131709474707. The next prime is 131709474791. The reversal of 131709474724 is 427474907131.

It is a happy number.

The square root of 131709474724 is 362918.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 635107 + ... + 816565.

Almost surely, 2^131709474724 is an apocalyptic number.

131709474724 is the 362918-th square number.

It is an amenable number.

131709474724 is a deficient number, since it is larger than the sum of its proper divisors (98783376263).

131709474724 is an frugal number, since it uses more digits than its factorization.

131709474724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362922 (or 181461 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

Multiplying 131709474724 by its sum of digits (49), we get a square (6453764261476 = 2540426²).

The spelling of 131709474724 in words is "one hundred thirty-one billion, seven hundred nine million, four hundred seventy-four thousand, seven hundred twenty-four".