99987239 has 8 divisors (see below), whose sum is σ = 109274880. Its totient is φ = 90732600.

The previous prime is 99987221. The next prime is 99987257. The reversal of 99987239 is 93278999.

It is an interprime number because it is at equal distance from previous prime (99987221) and next prime (99987257).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99987239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99987269) 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, 1679 + ... + 14240.

It is an arithmetic number, because the mean of its divisors is an integer number (13659360).

Almost surely, 2^99987239 is an apocalyptic number.

99987239 is a deficient number, since it is larger than the sum of its proper divisors (9287641).

99987239 is a wasteful number, since it uses less digits than its factorization.

99987239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16501.

The product of its digits is 2204496, while the sum is 56.

The square root of 99987239 is about 9999.3619296433. The cubic root of 99987239 is about 464.1391387497.

The spelling of 99987239 in words is "ninety-nine million, nine hundred eighty-seven thousand, two hundred thirty-nine".