87759709 has 2 divisors, whose sum is σ = 87759710. Its totient is φ = 87759708.

The previous prime is 87759677. The next prime is 87759733. The reversal of 87759709 is 90795778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56957209 + 30802500 = 7547^2 + 5550^2 .

It is a cyclic number.

It is not a de Polignac number, because 87759709 - 2⁵ = 87759677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87759739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43879854 + 43879855.

It is an arithmetic number, because the mean of its divisors is an integer number (43879855).

Almost surely, 2^87759709 is an apocalyptic number.

It is an amenable number.

87759709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87759709 is an equidigital number, since it uses as much as digits as its factorization.

87759709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 87759709 is about 9368.0152113455. The cubic root of 87759709 is about 444.3907987589.

The spelling of 87759709 in words is "eighty-seven million, seven hundred fifty-nine thousand, seven hundred nine".