1397839537 has 2 divisors, whose sum is σ = 1397839538. Its totient is φ = 1397839536.

The previous prime is 1397839529. The next prime is 1397839591. The reversal of 1397839537 is 7359387931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1395097201 + 2742336 = 37351^2 + 1656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397839537 - 2³ = 1397839529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397839517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698919768 + 698919769.

It is an arithmetic number, because the mean of its divisors is an integer number (698919769).

Almost surely, 2^1397839537 is an apocalyptic number.

It is an amenable number.

1397839537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397839537 is an equidigital number, since it uses as much as digits as its factorization.

1397839537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 55.

The square root of 1397839537 is about 37387.6923197996. The cubic root of 1397839537 is about 1118.1131967549.

The spelling of 1397839537 in words is "one billion, three hundred ninety-seven million, eight hundred thirty-nine thousand, five hundred thirty-seven".