1393257427 has 2 divisors, whose sum is σ = 1393257428. Its totient is φ = 1393257426.

The previous prime is 1393257421. The next prime is 1393257497. The reversal of 1393257427 is 7247523931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393257427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1393257421) 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, 696628713 + 696628714.

It is an arithmetic number, because the mean of its divisors is an integer number (696628714).

Almost surely, 2^1393257427 is an apocalyptic number.

1393257427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393257427 is an equidigital number, since it uses as much as digits as its factorization.

1393257427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 1393257427 is about 37326.3636991336. The cubic root of 1393257427 is about 1116.8901364990.

The spelling of 1393257427 in words is "one billion, three hundred ninety-three million, two hundred fifty-seven thousand, four hundred twenty-seven".