1397839523 has 2 divisors, whose sum is σ = 1397839524. Its totient is φ = 1397839522.

The previous prime is 1397839517. The next prime is 1397839529. The reversal of 1397839523 is 3259387931.

It is a balanced prime because it is at equal distance from previous prime (1397839517) and next prime (1397839529).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1397839523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397839529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698919761 + 698919762.

It is an arithmetic number, because the mean of its divisors is an integer number (698919762).

Almost surely, 2^1397839523 is an apocalyptic number.

1397839523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397839523 is an equidigital number, since it uses as much as digits as its factorization.

1397839523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 50.

The square root of 1397839523 is about 37387.6921325722. The cubic root of 1397839523 is about 1118.1131930221.

The spelling of 1397839523 in words is "one billion, three hundred ninety-seven million, eight hundred thirty-nine thousand, five hundred twenty-three".