87319581297 has 48 divisors (see below), whose sum is σ = 130262082048. Its totient is φ = 51952043520.

The previous prime is 87319581263. The next prime is 87319581313. The reversal of 87319581297 is 79218591378.

It is not a de Polignac number, because 87319581297 - 2⁶ = 87319581233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87319581297.

It is not an unprimeable number, because it can be changed into a prime (87319581497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22520523 + ... + 22524399.

It is an arithmetic number, because the mean of its divisors is an integer number (2713793376).

Almost surely, 2^87319581297 is an apocalyptic number.

It is an amenable number.

87319581297 is a deficient number, since it is larger than the sum of its proper divisors (42942500751).

87319581297 is a wasteful number, since it uses less digits than its factorization.

87319581297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370 (or 5357 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 60.

The spelling of 87319581297 in words is "eighty-seven billion, three hundred nineteen million, five hundred eighty-one thousand, two hundred ninety-seven".