87119999 has 4 divisors (see below), whose sum is σ = 88973664. Its totient is φ = 85266336.

The previous prime is 87119987. The next prime is 87120029. The reversal of 87119999 is 99991178.

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

It is a cyclic number.

It is not a de Polignac number, because 87119999 - 2⁴ = 87119983 is a prime.

It is a Duffinian number.

87119999 is a modest number, since divided by 9999 gives 8711 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 87119999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87119909) 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, 926762 + ... + 926855.

It is an arithmetic number, because the mean of its divisors is an integer number (22243416).

Almost surely, 2^87119999 is an apocalyptic number.

87119999 is a deficient number, since it is larger than the sum of its proper divisors (1853665).

87119999 is a wasteful number, since it uses less digits than its factorization.

87119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853664.

The product of its digits is 367416, while the sum is 53.

The square root of 87119999 is about 9333.8094580937. The cubic root of 87119999 is about 443.3083932051.

The spelling of 87119999 in words is "eighty-seven million, one hundred nineteen thousand, nine hundred ninety-nine".