87857233 has 2 divisors, whose sum is σ = 87857234. Its totient is φ = 87857232.

The previous prime is 87857191. The next prime is 87857251. The reversal of 87857233 is 33275878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 2331729 = 9248^2 + 1527^2 .

It is a cyclic number.

It is not a de Polignac number, because 87857233 - 2⁹ = 87856721 is a prime.

It is equal to p_5099983 and since 87857233 and 5099983 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87857233.

It is not a weakly prime, because it can be changed into another prime (87857333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43928616 + 43928617.

It is an arithmetic number, because the mean of its divisors is an integer number (43928617).

Almost surely, 2^87857233 is an apocalyptic number.

It is an amenable number.

87857233 is a deficient number, since it is larger than the sum of its proper divisors (1).

87857233 is an equidigital number, since it uses as much as digits as its factorization.

87857233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The square root of 87857233 is about 9373.2189241477. The cubic root of 87857233 is about 444.5553493067. Note that the first 3 decimals are identical.

The spelling of 87857233 in words is "eighty-seven million, eight hundred fifty-seven thousand, two hundred thirty-three".