87297999 has 8 divisors (see below), whose sum is σ = 117992112. Its totient is φ = 57401280.

The previous prime is 87297971. The next prime is 87298021. The reversal of 87297999 is 99979278.

It is a happy number.

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

It is not a de Polignac number, because 87297999 - 2⁵ = 87297967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87297919) 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, 199092 + ... + 199529.

It is an arithmetic number, because the mean of its divisors is an integer number (14749014).

Almost surely, 2^87297999 is an apocalyptic number.

87297999 is a deficient number, since it is larger than the sum of its proper divisors (30694113).

87297999 is a wasteful number, since it uses less digits than its factorization.

87297999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398697.

The product of its digits is 5143824, while the sum is 60.

The square root of 87297999 is about 9343.3398204282. The cubic root of 87297999 is about 443.6101043111.

The spelling of 87297999 in words is "eighty-seven million, two hundred ninety-seven thousand, nine hundred ninety-nine".