87259194017 has 2 divisors, whose sum is σ = 87259194018. Its totient is φ = 87259194016.

The previous prime is 87259194013. The next prime is 87259194031. The reversal of 87259194017 is 71049195278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43818630241 + 43440563776 = 209329^2 + 208424^2 .

It is a cyclic number.

It is not a de Polignac number, because 87259194017 - 2² = 87259194013 is a prime.

It is a super-2 number, since 2×87259194017² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87259194017.

It is not a weakly prime, because it can be changed into another prime (87259194013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43629597008 + 43629597009.

It is an arithmetic number, because the mean of its divisors is an integer number (43629597009).

Almost surely, 2^87259194017 is an apocalyptic number.

It is an amenable number.

87259194017 is a deficient number, since it is larger than the sum of its proper divisors (1).

87259194017 is an equidigital number, since it uses as much as digits as its factorization.

87259194017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 87259194017 in words is "eighty-seven billion, two hundred fifty-nine million, one hundred ninety-four thousand, seventeen".