87653249 has 4 divisors (see below), whose sum is σ = 87742164. Its totient is φ = 87564336.

The previous prime is 87653243. The next prime is 87653281. The reversal of 87653249 is 94235678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55651600 + 32001649 = 7460^2 + 5657^2 .

It is a cyclic number.

It is not a de Polignac number, because 87653249 - 2²⁰ = 86604673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87653243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42962 + ... + 44955.

It is an arithmetic number, because the mean of its divisors is an integer number (21935541).

Almost surely, 2^87653249 is an apocalyptic number.

It is an amenable number.

87653249 is a deficient number, since it is larger than the sum of its proper divisors (88915).

87653249 is an equidigital number, since it uses as much as digits as its factorization.

87653249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88914.

The product of its digits is 362880, while the sum is 44.

The square root of 87653249 is about 9362.3313869997. The cubic root of 87653249 is about 444.2110314216.

The spelling of 87653249 in words is "eighty-seven million, six hundred fifty-three thousand, two hundred forty-nine".