87102731 has 2 divisors, whose sum is σ = 87102732. Its totient is φ = 87102730.

The previous prime is 87102727. The next prime is 87102733. The reversal of 87102731 is 13720178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87102731 - 2² = 87102727 is a prime.

It is a super-2 number, since 2×87102731² = 15173771495316722, which contains 22 as substring.

Together with 87102733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87102694 and 87102703.

It is not a weakly prime, because it can be changed into another prime (87102733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43551365 + 43551366.

It is an arithmetic number, because the mean of its divisors is an integer number (43551366).

Almost surely, 2^87102731 is an apocalyptic number.

87102731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87102731 is an equidigital number, since it uses as much as digits as its factorization.

87102731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 87102731 is about 9332.8843880121. The cubic root of 87102731 is about 443.2791019775.

The spelling of 87102731 in words is "eighty-seven million, one hundred two thousand, seven hundred thirty-one".