1390375791 has 12 divisors (see below), whose sum is σ = 2295223632. Its totient is φ = 794500416.

The previous prime is 1390375781. The next prime is 1390375801. The reversal of 1390375791 is 1975730931.

It is an interprime number because it is at equal distance from previous prime (1390375781) and next prime (1390375801).

It is not a de Polignac number, because 1390375791 - 2⁷ = 1390375663 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390375741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11034666 + ... + 11034791.

It is an arithmetic number, because the mean of its divisors is an integer number (191268636).

Almost surely, 2^1390375791 is an apocalyptic number.

1390375791 is a deficient number, since it is larger than the sum of its proper divisors (904847841).

1390375791 is a wasteful number, since it uses less digits than its factorization.

1390375791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22069470 (or 22069467 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 45.

The square root of 1390375791 is about 37287.7431738634. The cubic root of 1390375791 is about 1116.1195939781.

The spelling of 1390375791 in words is "one billion, three hundred ninety million, three hundred seventy-five thousand, seven hundred ninety-one".