1392724689 has 8 divisors (see below), whose sum is σ = 1858768032. Its totient is φ = 927582240.

The previous prime is 1392724679. The next prime is 1392724703. The reversal of 1392724689 is 9864272931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1392724689 - 2⁷ = 1392724561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1392724679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221607 + ... + 227804.

It is an arithmetic number, because the mean of its divisors is an integer number (232346004).

Almost surely, 2^1392724689 is an apocalyptic number.

It is an amenable number.

1392724689 is a deficient number, since it is larger than the sum of its proper divisors (466043343).

1392724689 is a wasteful number, since it uses less digits than its factorization.

1392724689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450447.

The product of its digits is 1306368, while the sum is 51.

The square root of 1392724689 is about 37319.2268006721. The cubic root of 1392724689 is about 1116.7477637496.

The spelling of 1392724689 in words is "one billion, three hundred ninety-two million, seven hundred twenty-four thousand, six hundred eighty-nine".