1390277931 has 12 divisors (see below), whose sum is σ = 2156349672. Its totient is φ = 794444448.

The previous prime is 1390277929. The next prime is 1390277953. The reversal of 1390277931 is 1397720931.

It is not a de Polignac number, because 1390277931 - 2¹ = 1390277929 is a prime.

It is a super-2 number, since 2×1390277931² = 3865745450851281522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1390277431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4728690 + ... + 4728983.

It is an arithmetic number, because the mean of its divisors is an integer number (179695806).

Almost surely, 2^1390277931 is an apocalyptic number.

1390277931 is a deficient number, since it is larger than the sum of its proper divisors (766071741).

1390277931 is an equidigital number, since it uses as much as digits as its factorization.

1390277931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457690 (or 9457683 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 1390277931 is about 37286.4309233265. The cubic root of 1390277931 is about 1116.0934077660.

The spelling of 1390277931 in words is "one billion, three hundred ninety million, two hundred seventy-seven thousand, nine hundred thirty-one".