87119309 has 2 divisors, whose sum is σ = 87119310. Its totient is φ = 87119308.

The previous prime is 87119303. The next prime is 87119311. The reversal of 87119309 is 90391178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 19386409 = 8230^2 + 4403^2 .

It is a cyclic number.

It is not a de Polignac number, because 87119309 - 2²⁴ = 70342093 is a prime.

It is a Sophie Germain prime.

Together with 87119311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87119303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43559654 + 43559655.

It is an arithmetic number, because the mean of its divisors is an integer number (43559655).

Almost surely, 2^87119309 is an apocalyptic number.

It is an amenable number.

87119309 is a deficient number, since it is larger than the sum of its proper divisors (1).

87119309 is an equidigital number, since it uses as much as digits as its factorization.

87119309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 87119309 is about 9333.7724956204. The cubic root of 87119309 is about 443.3072228515.

The spelling of 87119309 in words is "eighty-seven million, one hundred nineteen thousand, three hundred nine".