999141431 has 4 divisors (see below), whose sum is σ = 999381264. Its totient is φ = 998901600.

The previous prime is 999141373. The next prime is 999141433. The reversal of 999141431 is 134141999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 999141431 - 2¹⁴ = 999125047 is a prime.

It is a super-2 number, since 2×999141431² = 1996567198281455522, 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 (999141433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113555 + ... + 122036.

It is an arithmetic number, because the mean of its divisors is an integer number (249845316).

Almost surely, 2^999141431 is an apocalyptic number.

999141431 is a deficient number, since it is larger than the sum of its proper divisors (239833).

999141431 is a wasteful number, since it uses less digits than its factorization.

999141431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239832.

The product of its digits is 34992, while the sum is 41.

The square root of 999141431 is about 31609.1985187856. The cubic root of 999141431 is about 999.7137283897.

The spelling of 999141431 in words is "nine hundred ninety-nine million, one hundred forty-one thousand, four hundred thirty-one".