87907709 has 2 divisors, whose sum is σ = 87907710. Its totient is φ = 87907708.

The previous prime is 87907657. The next prime is 87907741. The reversal of 87907709 is 90770978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 14462809 = 8570^2 + 3803^2 .

It is a cyclic number.

It is not a de Polignac number, because 87907709 - 2²⁰ = 86859133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87907789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43953854 + 43953855.

It is an arithmetic number, because the mean of its divisors is an integer number (43953855).

Almost surely, 2^87907709 is an apocalyptic number.

It is an amenable number.

87907709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87907709 is an equidigital number, since it uses as much as digits as its factorization.

87907709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 87907709 is about 9375.9111023943. The cubic root of 87907709 is about 444.6404687636.

The spelling of 87907709 in words is "eighty-seven million, nine hundred seven thousand, seven hundred nine".