87349509 has 42 divisors (see below), whose sum is σ = 142013490. Its totient is φ = 53677728.

The previous prime is 87349487. The next prime is 87349541. The reversal of 87349509 is 90594378.

It can be written as a sum of positive squares in 3 ways, for example, as 3572100 + 83777409 = 1890^2 + 9153^2 .

It is not a de Polignac number, because 87349509 - 2²⁰ = 86300933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87349109) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 122847 + ... + 123555.

Almost surely, 2^87349509 is an apocalyptic number.

It is an amenable number.

87349509 is a deficient number, since it is larger than the sum of its proper divisors (54663981).

87349509 is an equidigital number, since it uses as much as digits as its factorization.

87349509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 87349509 is about 9346.0959228974. The cubic root of 87349509 is about 443.6973375579.

The spelling of 87349509 in words is "eighty-seven million, three hundred forty-nine thousand, five hundred nine".