999899403 has 16 divisors (see below), whose sum is σ = 1339873920. Its totient is φ = 663272064.

The previous prime is 999899399. The next prime is 999899429. The reversal of 999899403 is 304998999.

It is not a de Polignac number, because 999899403 - 2² = 999899399 is a prime.

It is a super-2 number, since 2×999899403² = 1999597632239512818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999899443) 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, 673500 + ... + 674982.

It is an arithmetic number, because the mean of its divisors is an integer number (83742120).

Almost surely, 2^999899403 is an apocalyptic number.

999899403 is a deficient number, since it is larger than the sum of its proper divisors (339974517).

999899403 is a wasteful number, since it uses less digits than its factorization.

999899403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458.

The product of its (nonzero) digits is 5668704, while the sum is 60.

The square root of 999899403 is about 31621.1859834510. The cubic root of 999899403 is about 999.9664665422.

The spelling of 999899403 in words is "nine hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred three".