87631285757 has 2 divisors, whose sum is σ = 87631285758. Its totient is φ = 87631285756.

The previous prime is 87631285741. The next prime is 87631285837. The reversal of 87631285757 is 75758213678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69136917721 + 18494368036 = 262939^2 + 135994^2 .

It is a cyclic number.

It is not a de Polignac number, because 87631285757 - 2⁴ = 87631285741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87631285696 and 87631285705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87631285457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43815642878 + 43815642879.

It is an arithmetic number, because the mean of its divisors is an integer number (43815642879).

Almost surely, 2^87631285757 is an apocalyptic number.

It is an amenable number.

87631285757 is a deficient number, since it is larger than the sum of its proper divisors (1).

87631285757 is an equidigital number, since it uses as much as digits as its factorization.

87631285757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19756800, while the sum is 59.

The spelling of 87631285757 in words is "eighty-seven billion, six hundred thirty-one million, two hundred eighty-five thousand, seven hundred fifty-seven".