87492731 has 2 divisors, whose sum is σ = 87492732. Its totient is φ = 87492730.

The previous prime is 87492719. The next prime is 87492733. The reversal of 87492731 is 13729478.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87492731 is a prime.

It is a super-2 number, since 2×87492731² = 15309955955676722, which contains 22 as substring.

Together with 87492733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87492733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43746365 + 43746366.

It is an arithmetic number, because the mean of its divisors is an integer number (43746366).

Almost surely, 2^87492731 is an apocalyptic number.

87492731 is a deficient number, since it is larger than the sum of its proper divisors (1).

87492731 is an equidigital number, since it uses as much as digits as its factorization.

87492731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 87492731 is about 9353.7549144715. The cubic root of 87492731 is about 443.9397068657.

The spelling of 87492731 in words is "eighty-seven million, four hundred ninety-two thousand, seven hundred thirty-one".