999497599 has 8 divisors (see below), whose sum is σ = 1005418400. Its totient is φ = 993586176.

The previous prime is 999497561. The next prime is 999497617. The reversal of 999497599 is 995794999.

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

It is a 10-Lehmer number, since φ(999497599) divides (999497599-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 999497599 - 2²³ = 991108991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999497509) 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, 419299 + ... + 421675.

It is an arithmetic number, because the mean of its divisors is an integer number (125677300).

Almost surely, 2^999497599 is an apocalyptic number.

999497599 is a deficient number, since it is larger than the sum of its proper divisors (5920801).

999497599 is a wasteful number, since it uses less digits than its factorization.

999497599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689.

The product of its digits is 74401740, while the sum is 70.

The square root of 999497599 is about 31614.8319464140. The cubic root of 999497599 is about 999.8325049470.

The spelling of 999497599 in words is "nine hundred ninety-nine million, four hundred ninety-seven thousand, five hundred ninety-nine".