1390067431 has 2 divisors, whose sum is σ = 1390067432. Its totient is φ = 1390067430.

The previous prime is 1390067429. The next prime is 1390067443. The reversal of 1390067431 is 1347600931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390067431 - 2¹ = 1390067429 is a prime.

It is a super-2 number, since 2×1390067431² = 3864574925453879522, which contains 22 as substring.

Together with 1390067429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390067461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695033715 + 695033716.

It is an arithmetic number, because the mean of its divisors is an integer number (695033716).

Almost surely, 2^1390067431 is an apocalyptic number.

1390067431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390067431 is an equidigital number, since it uses as much as digits as its factorization.

1390067431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1390067431 is about 37283.6080737903. The cubic root of 1390067431 is about 1116.0370762188.

The spelling of 1390067431 in words is "one billion, three hundred ninety million, sixty-seven thousand, four hundred thirty-one".