87699999 has 8 divisors (see below), whose sum is σ = 116990512. Its totient is φ = 58438080.

The previous prime is 87699971. The next prime is 87700003. The reversal of 87699999 is 99999678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87699999 - 2⁹ = 87699487 is a prime.

It is a Duffinian number.

87699999 is a modest number, since divided by 9999 gives 8769 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87699929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (14623814).

Almost surely, 2^87699999 is an apocalyptic number.

87699999 is a deficient number, since it is larger than the sum of its proper divisors (29290513).

87699999 is a wasteful number, since it uses less digits than its factorization.

87699999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14297.

The product of its digits is 19840464, while the sum is 66.

The square root of 87699999 is about 9364.8277613633. The cubic root of 87699999 is about 444.2899909393.

The spelling of 87699999 in words is "eighty-seven million, six hundred ninety-nine thousand, nine hundred ninety-nine".