1397087873971 has 4 divisors (see below), whose sum is σ = 1397106962944. Its totient is φ = 1397068785000.

The previous prime is 1397087873953. The next prime is 1397087873977. The reversal of 1397087873971 is 1793787807931.

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 1397087873971 - 2³⁵ = 1362728135603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397087873971.

It is not an unprimeable number, because it can be changed into a prime (1397087873977) 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, 9434280 + ... + 9581221.

It is an arithmetic number, because the mean of its divisors is an integer number (349276740736).

Almost surely, 2^{1397087873971} is an apocalyptic number.

1397087873971 is a deficient number, since it is larger than the sum of its proper divisors (19088973).

1397087873971 is an equidigital number, since it uses as much as digits as its factorization.

1397087873971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19088972.

The product of its (nonzero) digits is 112021056, while the sum is 70.

The spelling of 1397087873971 in words is "one trillion, three hundred ninety-seven billion, eighty-seven million, eight hundred seventy-three thousand, nine hundred seventy-one".