1390612823 has 2 divisors, whose sum is σ = 1390612824. Its totient is φ = 1390612822.

The previous prime is 1390612813. The next prime is 1390612879. The reversal of 1390612823 is 3282160931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390612823 - 2⁶ = 1390612759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390612813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695306411 + 695306412.

It is an arithmetic number, because the mean of its divisors is an integer number (695306412).

Almost surely, 2^1390612823 is an apocalyptic number.

1390612823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390612823 is an equidigital number, since it uses as much as digits as its factorization.

1390612823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1390612823 is about 37290.9214554964. The cubic root of 1390612823 is about 1116.1830159270.

The spelling of 1390612823 in words is "one billion, three hundred ninety million, six hundred twelve thousand, eight hundred twenty-three".