87645747 has 8 divisors (see below), whose sum is σ = 133555456. Its totient is φ = 50083272.

The previous prime is 87645713. The next prime is 87645763. The reversal of 87645747 is 74754678.

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

It is not a de Polignac number, because 87645747 - 2⁶ = 87645683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87645696 and 87645705.

It is not an unprimeable number, because it can be changed into a prime (87645707) 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, 2086783 + ... + 2086824.

It is an arithmetic number, because the mean of its divisors is an integer number (16694432).

Almost surely, 2^87645747 is an apocalyptic number.

87645747 is a deficient number, since it is larger than the sum of its proper divisors (45909709).

87645747 is a wasteful number, since it uses less digits than its factorization.

87645747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173617.

The product of its digits is 1317120, while the sum is 48.

The square root of 87645747 is about 9361.9307303569. The cubic root of 87645747 is about 444.1983581274.

The spelling of 87645747 in words is "eighty-seven million, six hundred forty-five thousand, seven hundred forty-seven".