1390570991 has 2 divisors, whose sum is σ = 1390570992. Its totient is φ = 1390570990.

The previous prime is 1390570949. The next prime is 1390571011. The reversal of 1390570991 is 1990750931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1390570991 - 2⁶ = 1390570927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390570921) 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 as a sum of consecutive naturals, namely, 695285495 + 695285496.

It is an arithmetic number, because the mean of its divisors is an integer number (695285496).

Almost surely, 2^1390570991 is an apocalyptic number.

1390570991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390570991 is an equidigital number, since it uses as much as digits as its factorization.

1390570991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 1390570991 is about 37290.3605640922. The cubic root of 1390570991 is about 1116.1718235866.

The spelling of 1390570991 in words is "one billion, three hundred ninety million, five hundred seventy thousand, nine hundred ninety-one".