87440999 has 8 divisors (see below), whose sum is σ = 89696640. Its totient is φ = 85212000.

The previous prime is 87440989. The next prime is 87441001. The reversal of 87440999 is 99904478.

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

It is a cyclic number.

It is not a de Polignac number, because 87440999 - 2¹² = 87436903 is a prime.

It is a super-2 number, since 2×87440999² = 15291856612236002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87440959) 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, 74 + ... + 13224.

It is an arithmetic number, because the mean of its divisors is an integer number (11212080).

Almost surely, 2^87440999 is an apocalyptic number.

87440999 is a deficient number, since it is larger than the sum of its proper divisors (2255641).

87440999 is a wasteful number, since it uses less digits than its factorization.

87440999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13321.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 87440999 is about 9350.9891990099. The cubic root of 87440999 is about 443.8521932460.

The spelling of 87440999 in words is "eighty-seven million, four hundred forty thousand, nine hundred ninety-nine".