1392630643 has 2 divisors, whose sum is σ = 1392630644. Its totient is φ = 1392630642.

The previous prime is 1392630571. The next prime is 1392630653. The reversal of 1392630643 is 3460362931.

It is a strong prime.

It is an emirp because it is prime and its reverse (3460362931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1392630643 - 2²⁵ = 1359076211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1392630653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696315321 + 696315322.

It is an arithmetic number, because the mean of its divisors is an integer number (696315322).

Almost surely, 2^1392630643 is an apocalyptic number.

1392630643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392630643 is an equidigital number, since it uses as much as digits as its factorization.

1392630643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 1392630643 is about 37317.9667586539. The cubic root of 1392630643 is about 1116.7226264474.

The spelling of 1392630643 in words is "one billion, three hundred ninety-two million, six hundred thirty thousand, six hundred forty-three".