999413623 has 16 divisors (see below), whose sum is σ = 1163569120. Its totient is φ = 850352256.

The previous prime is 999413599. The next prime is 999413627. The reversal of 999413623 is 326314999.

It is a de Polignac number, because none of the positive numbers 2^k-999413623 is a prime.

It is a super-2 number, since 2×999413623² = 1997655179675972258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999413627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45540 + ... + 63817.

It is an arithmetic number, because the mean of its divisors is an integer number (72723070).

Almost surely, 2^999413623 is an apocalyptic number.

999413623 is a deficient number, since it is larger than the sum of its proper divisors (164155497).

999413623 is a wasteful number, since it uses less digits than its factorization.

999413623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109426.

The product of its digits is 314928, while the sum is 46.

The square root of 999413623 is about 31613.5038077085. The cubic root of 999413623 is about 999.8045027833.

The spelling of 999413623 in words is "nine hundred ninety-nine million, four hundred thirteen thousand, six hundred twenty-three".