1397251927 has 2 divisors, whose sum is σ = 1397251928. Its totient is φ = 1397251926.

The previous prime is 1397251859. The next prime is 1397251967. The reversal of 1397251927 is 7291527931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1397251927 - 2⁷ = 1397251799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397251967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698625963 + 698625964.

It is an arithmetic number, because the mean of its divisors is an integer number (698625964).

Almost surely, 2^1397251927 is an apocalyptic number.

1397251927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397251927 is an equidigital number, since it uses as much as digits as its factorization.

1397251927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 1397251927 is about 37379.8331590712. The cubic root of 1397251927 is about 1117.9565009963.

The spelling of 1397251927 in words is "one billion, three hundred ninety-seven million, two hundred fifty-one thousand, nine hundred twenty-seven".