87230831 has 2 divisors, whose sum is σ = 87230832. Its totient is φ = 87230830.

The previous prime is 87230827. The next prime is 87230833. The reversal of 87230831 is 13803278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87230831 - 2² = 87230827 is a prime.

It is a super-2 number, since 2×87230831² = 15218435753901122, which contains 22 as substring.

Together with 87230833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87230833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43615415 + 43615416.

It is an arithmetic number, because the mean of its divisors is an integer number (43615416).

Almost surely, 2^87230831 is an apocalyptic number.

87230831 is a deficient number, since it is larger than the sum of its proper divisors (1).

87230831 is an equidigital number, since it uses as much as digits as its factorization.

87230831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 87230831 is about 9339.7446967249. The cubic root of 87230831 is about 443.4963023570.

The spelling of 87230831 in words is "eighty-seven million, two hundred thirty thousand, eight hundred thirty-one".