87956731 has 2 divisors, whose sum is σ = 87956732. Its totient is φ = 87956730.

The previous prime is 87956689. The next prime is 87956741. The reversal of 87956731 is 13765978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87956731 - 2¹¹ = 87954683 is a prime.

It is a super-2 number, since 2×87956731² = 15472773056412722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87956741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43978365 + 43978366.

It is an arithmetic number, because the mean of its divisors is an integer number (43978366).

Almost surely, 2^87956731 is an apocalyptic number.

87956731 is the 5932-nd centered pentagonal number.

87956731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87956731 is an equidigital number, since it uses as much as digits as its factorization.

87956731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 87956731 is about 9378.5249906369. The cubic root of 87956731 is about 444.7231051058.

The spelling of 87956731 in words is "eighty-seven million, nine hundred fifty-six thousand, seven hundred thirty-one".