87717186131 has 2 divisors, whose sum is σ = 87717186132. Its totient is φ = 87717186130.

The previous prime is 87717186121. The next prime is 87717186203. The reversal of 87717186131 is 13168171778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87717186131 - 2²² = 87712991827 is a prime.

It is a super-2 number, since 2×87717186131² (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 87717186131.

It is not a weakly prime, because it can be changed into another prime (87717186121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43858593065 + 43858593066.

It is an arithmetic number, because the mean of its divisors is an integer number (43858593066).

Almost surely, 2^87717186131 is an apocalyptic number.

87717186131 is a deficient number, since it is larger than the sum of its proper divisors (1).

87717186131 is an equidigital number, since it uses as much as digits as its factorization.

87717186131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 50.

The spelling of 87717186131 in words is "eighty-seven billion, seven hundred seventeen million, one hundred eighty-six thousand, one hundred thirty-one".