1391257627 has 2 divisors, whose sum is σ = 1391257628. Its totient is φ = 1391257626.

The previous prime is 1391257559. The next prime is 1391257643. The reversal of 1391257627 is 7267521931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7267521931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1391257627 - 2¹⁹ = 1390733339 is a prime.

It is a super-2 number, since 2×1391257627² = 3871195569371342258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1391257667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695628813 + 695628814.

It is an arithmetic number, because the mean of its divisors is an integer number (695628814).

Almost surely, 2^1391257627 is an apocalyptic number.

1391257627 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391257627 is an equidigital number, since it uses as much as digits as its factorization.

1391257627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 1391257627 is about 37299.5660430520. The cubic root of 1391257627 is about 1116.3555077593.

The spelling of 1391257627 in words is "one billion, three hundred ninety-one million, two hundred fifty-seven thousand, six hundred twenty-seven".