1392931684 has 9 divisors (see below), whose sum is σ = 2437761081. Its totient is φ = 696428520.

The previous prime is 1392931651. The next prime is 1392931691. The reversal of 1392931684 is 4861392931.

It is a happy number.

The square root of 1392931684 is 37322.

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., 122722084 + 1270209600 = 11078^2 + 35640^2 .

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, 65314 + ... + 83974.

Almost surely, 2^1392931684 is an apocalyptic number.

1392931684 is the 37322-nd square number.

It is an amenable number.

1392931684 is a deficient number, since it is larger than the sum of its proper divisors (1044829397).

1392931684 is an frugal number, since it uses more digits than its factorization.

1392931684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37326 (or 18663 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The cubic root of 1392931684 is about 1116.8030869000.

It can be divided in two parts, 1392931 and 684, that added together give a triangular number (1393615 = T₁₆₆₉).

The spelling of 1392931684 in words is "one billion, three hundred ninety-two million, nine hundred thirty-one thousand, six hundred eighty-four".