87309253 has 2 divisors, whose sum is σ = 87309254. Its totient is φ = 87309252.

The previous prime is 87309223. The next prime is 87309259. The reversal of 87309253 is 35290378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65011969 + 22297284 = 8063^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 87309253 - 2¹⁷ = 87178181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87309259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43654626 + 43654627.

It is an arithmetic number, because the mean of its divisors is an integer number (43654627).

Almost surely, 2^87309253 is an apocalyptic number.

It is an amenable number.

87309253 is a deficient number, since it is larger than the sum of its proper divisors (1).

87309253 is an equidigital number, since it uses as much as digits as its factorization.

87309253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 87309253 is about 9343.9420481936. The cubic root of 87309253 is about 443.6291661211.

The spelling of 87309253 in words is "eighty-seven million, three hundred nine thousand, two hundred fifty-three".