87612749 has 8 divisors (see below), whose sum is σ = 100191168. Its totient is φ = 75049920.

The previous prime is 87612737. The next prime is 87612821. The reversal of 87612749 is 94721678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87612749 - 2²⁰ = 86564173 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87612719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13109 + ... + 18629.

It is an arithmetic number, because the mean of its divisors is an integer number (12523896).

Almost surely, 2^87612749 is an apocalyptic number.

It is an amenable number.

87612749 is a deficient number, since it is larger than the sum of its proper divisors (12578419).

87612749 is a wasteful number, since it uses less digits than its factorization.

87612749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795.

The product of its digits is 169344, while the sum is 44.

The square root of 87612749 is about 9360.1682143004. The cubic root of 87612749 is about 444.1426052897.

The spelling of 87612749 in words is "eighty-seven million, six hundred twelve thousand, seven hundred forty-nine".