999999617 has 4 divisors (see below), whose sum is σ = 1012657920. Its totient is φ = 987341316.

The previous prime is 999999613. The next prime is 999999667. The reversal of 999999617 is 716999999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 999999617 - 2² = 999999613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999999613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6329033 + ... + 6329190.

It is an arithmetic number, because the mean of its divisors is an integer number (253164480).

Almost surely, 2^999999617 is an apocalyptic number.

It is an amenable number.

999999617 is a deficient number, since it is larger than the sum of its proper divisors (12658303).

999999617 is a wasteful number, since it uses less digits than its factorization.

999999617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12658302.

The product of its digits is 22320522, while the sum is 68.

The square root of 999999617 is about 31622.7705459215. The cubic root of 999999617 is about 999.9998723333. Note that the first 3 decimals are identical.

The spelling of 999999617 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred seventeen".