87249233 has 2 divisors, whose sum is σ = 87249234. Its totient is φ = 87249232.

The previous prime is 87249167. The next prime is 87249241. The reversal of 87249233 is 33294278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 13082689 = 8612^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 87249233 - 2²⁰ = 86200657 is a prime.

It is a super-2 number, since 2×87249233² = 15224857318176578, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87240233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43624616 + 43624617.

It is an arithmetic number, because the mean of its divisors is an integer number (43624617).

Almost surely, 2^87249233 is an apocalyptic number.

It is an amenable number.

87249233 is a deficient number, since it is larger than the sum of its proper divisors (1).

87249233 is an equidigital number, since it uses as much as digits as its factorization.

87249233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 87249233 is about 9340.7297894758. The cubic root of 87249233 is about 443.5274864580.

It can be divided in two parts, 872 and 49233, that added together give a palindrome (50105).

The spelling of 87249233 in words is "eighty-seven million, two hundred forty-nine thousand, two hundred thirty-three".