1379931973 has 24 divisors (see below), whose sum is σ = 1702515672. Its totient is φ = 1111348224.

The previous prime is 1379931961. The next prime is 1379931977. The reversal of 1379931973 is 3791399731.

It can be written as a sum of positive squares in 4 ways, for example, as 831341889 + 548590084 = 28833^2 + 23422^2 .

It is not a de Polignac number, because 1379931973 - 2⁵ = 1379931941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1379931973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379931977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 712915 + ... + 714847.

It is an arithmetic number, because the mean of its divisors is an integer number (70938153).

Almost surely, 2^1379931973 is an apocalyptic number.

It is an amenable number.

1379931973 is a deficient number, since it is larger than the sum of its proper divisors (322583699).

1379931973 is a wasteful number, since it uses less digits than its factorization.

1379931973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821 (or 2814 counting only the distinct ones).

The product of its digits is 964467, while the sum is 52.

The square root of 1379931973 is about 37147.4356180881. The cubic root of 1379931973 is about 1113.3179872766.

The spelling of 1379931973 in words is "one billion, three hundred seventy-nine million, nine hundred thirty-one thousand, nine hundred seventy-three".