1391297678627 has 2 divisors, whose sum is σ = 1391297678628. Its totient is φ = 1391297678626.

The previous prime is 1391297678399. The next prime is 1391297678653. The reversal of 1391297678627 is 7268767921931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1391297678627 - 2¹² = 1391297674531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1391297671627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695648839313 + 695648839314.

It is an arithmetic number, because the mean of its divisors is an integer number (695648839314).

Almost surely, 2^{1391297678627} is an apocalyptic number.

1391297678627 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391297678627 is an equidigital number, since it uses as much as digits as its factorization.

1391297678627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96018048, while the sum is 68.

The spelling of 1391297678627 in words is "one trillion, three hundred ninety-one billion, two hundred ninety-seven million, six hundred seventy-eight thousand, six hundred twenty-seven".