1392630641 has 4 divisors (see below), whose sum is σ = 1426597284. Its totient is φ = 1358664000.

The previous prime is 1392630571. The next prime is 1392630643. The reversal of 1392630641 is 1460362931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 376360000 + 1016270641 = 19400^2 + 31879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392630641 - 2¹⁴ = 1392614257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392630643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16983260 + ... + 16983341.

It is an arithmetic number, because the mean of its divisors is an integer number (356649321).

Almost surely, 2^1392630641 is an apocalyptic number.

It is an amenable number.

1392630641 is a deficient number, since it is larger than the sum of its proper divisors (33966643).

1392630641 is an equidigital number, since it uses as much as digits as its factorization.

1392630641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33966642.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1392630641 is about 37317.9667318572. The cubic root of 1392630641 is about 1116.7226259128.

The spelling of 1392630641 in words is "one billion, three hundred ninety-two million, six hundred thirty thousand, six hundred forty-one".