87186735131 has 2 divisors, whose sum is σ = 87186735132. Its totient is φ = 87186735130.

The previous prime is 87186735073. The next prime is 87186735149. The reversal of 87186735131 is 13153768178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87186735131 - 2¹⁴ = 87186718747 is a prime.

It is a super-2 number, since 2×87186735131² (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 87186735131.

It is not a weakly prime, because it can be changed into another prime (87186735151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43593367565 + 43593367566.

It is an arithmetic number, because the mean of its divisors is an integer number (43593367566).

Almost surely, 2^87186735131 is an apocalyptic number.

87186735131 is a deficient number, since it is larger than the sum of its proper divisors (1).

87186735131 is an equidigital number, since it uses as much as digits as its factorization.

87186735131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 50.

The spelling of 87186735131 in words is "eighty-seven billion, one hundred eighty-six million, seven hundred thirty-five thousand, one hundred thirty-one".