31429899 has 12 divisors (see below), whose sum is σ = 45448312. Its totient is φ = 20930400.

The previous prime is 31429897. The next prime is 31429907. The reversal of 31429899 is 99892413.

It is not a de Polignac number, because 31429899 - 2¹ = 31429897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31429897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12639 + ... + 14919.

Almost surely, 2^31429899 is an apocalyptic number.

31429899 is a deficient number, since it is larger than the sum of its proper divisors (14018413).

31429899 is a wasteful number, since it uses less digits than its factorization.

31429899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818 (or 3815 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 31429899 is about 5606.2375083473. The cubic root of 31429899 is about 315.5835290936.

It can be divided in two parts, 3142 and 9899, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 31429899 in words is "thirty-one million, four hundred twenty-nine thousand, eight hundred ninety-nine".