87913749 has 64 divisors (see below), whose sum is σ = 157704192. Its totient is φ = 42163200.

The previous prime is 87913699. The next prime is 87913753. The reversal of 87913749 is 94731978.

It is not a de Polignac number, because 87913749 - 2⁸ = 87913493 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87913698 and 87913707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87913759) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 239364 + ... + 239730.

It is an arithmetic number, because the mean of its divisors is an integer number (2464128).

Almost surely, 2^87913749 is an apocalyptic number.

It is an amenable number.

87913749 is a deficient number, since it is larger than the sum of its proper divisors (69790443).

87913749 is a wasteful number, since it uses less digits than its factorization.

87913749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 381024, while the sum is 48.

The square root of 87913749 is about 9376.2331988918. The cubic root of 87913749 is about 444.6506520455.

The spelling of 87913749 in words is "eighty-seven million, nine hundred thirteen thousand, seven hundred forty-nine".