1397942975239 has 4 divisors (see below), whose sum is σ = 1398083609160. Its totient is φ = 1397802341320.

The previous prime is 1397942975227. The next prime is 1397942975263. The reversal of 1397942975239 is 9325792497931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1397942975239 - 2¹⁵ = 1397942942471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397942975939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70302049 + ... + 70321930.

It is an arithmetic number, because the mean of its divisors is an integer number (349520902290).

Almost surely, 2^{1397942975239} is an apocalyptic number.

1397942975239 is a deficient number, since it is larger than the sum of its proper divisors (140633921).

1397942975239 is an equidigital number, since it uses as much as digits as its factorization.

1397942975239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140633920.

The product of its digits is 231472080, while the sum is 70.

The spelling of 1397942975239 in words is "one trillion, three hundred ninety-seven billion, nine hundred forty-two million, nine hundred seventy-five thousand, two hundred thirty-nine".