87233257 has 2 divisors, whose sum is σ = 87233258. Its totient is φ = 87233256.

The previous prime is 87233231. The next prime is 87233297. The reversal of 87233257 is 75233278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87160896 + 72361 = 9336^2 + 269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87233257 is a prime.

It is a super-2 number, since 2×87233257² = 15219282253656098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87233297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43616628 + 43616629.

It is an arithmetic number, because the mean of its divisors is an integer number (43616629).

Almost surely, 2^87233257 is an apocalyptic number.

It is an amenable number.

87233257 is a deficient number, since it is larger than the sum of its proper divisors (1).

87233257 is an equidigital number, since it uses as much as digits as its factorization.

87233257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 37.

The square root of 87233257 is about 9339.8745708923. The cubic root of 87233257 is about 443.5004137170.

The spelling of 87233257 in words is "eighty-seven million, two hundred thirty-three thousand, two hundred fifty-seven".