87308761 has 4 divisors (see below), whose sum is σ = 87761332. Its totient is φ = 86856192.

The previous prime is 87308729. The next prime is 87308783. The reversal of 87308761 is 16780378.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32844361 + 54464400 = 5731^2 + 7380^2 .

It is a cyclic number.

It is not a de Polignac number, because 87308761 - 2⁵ = 87308729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87308701) 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, 225996 + ... + 226381.

It is an arithmetic number, because the mean of its divisors is an integer number (21940333).

Almost surely, 2^87308761 is an apocalyptic number.

It is an amenable number.

87308761 is a deficient number, since it is larger than the sum of its proper divisors (452571).

87308761 is a wasteful number, since it uses less digits than its factorization.

87308761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452570.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 87308761 is about 9343.9157209384. The cubic root of 87308761 is about 443.6283328151.

The spelling of 87308761 in words is "eighty-seven million, three hundred eight thousand, seven hundred sixty-one".