87012757 has 4 divisors (see below), whose sum is σ = 93706060. Its totient is φ = 80319456.

The previous prime is 87012743. The next prime is 87012763. The reversal of 87012757 is 75721078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75721078 = 2 ⋅37860539.

It can be written as a sum of positive squares in 2 ways, for example, as 39112516 + 47900241 = 6254^2 + 6921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87012757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87012707) 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, 3346632 + ... + 3346657.

It is an arithmetic number, because the mean of its divisors is an integer number (23426515).

Almost surely, 2^87012757 is an apocalyptic number.

It is an amenable number.

87012757 is a deficient number, since it is larger than the sum of its proper divisors (6693303).

87012757 is a wasteful number, since it uses less digits than its factorization.

87012757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693302.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 87012757 is about 9328.0628750025. The cubic root of 87012757 is about 443.1264189172.

The spelling of 87012757 in words is "eighty-seven million, twelve thousand, seven hundred fifty-seven".