87959009 has 2 divisors, whose sum is σ = 87959010. Its totient is φ = 87959008.

The previous prime is 87958987. The next prime is 87959017. The reversal of 87959009 is 90095978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 8392609 = 8920^2 + 2897^2 .

It is a cyclic number.

It is not a de Polignac number, because 87959009 - 2⁸ = 87958753 is a prime.

It is not a weakly prime, because it can be changed into another prime (87959089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43979504 + 43979505.

It is an arithmetic number, because the mean of its divisors is an integer number (43979505).

Almost surely, 2^87959009 is an apocalyptic number.

It is an amenable number.

87959009 is a deficient number, since it is larger than the sum of its proper divisors (1).

87959009 is an equidigital number, since it uses as much as digits as its factorization.

87959009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 87959009 is about 9378.6464375196. The cubic root of 87959009 is about 444.7269443818.

The spelling of 87959009 in words is "eighty-seven million, nine hundred fifty-nine thousand, nine".