31799009 has 8 divisors (see below), whose sum is σ = 35015328. Its totient is φ = 28636960.

The previous prime is 31799003. The next prime is 31799023. The reversal of 31799009 is 90099713.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31799009 - 2²⁴ = 15021793 is a prime.

It is a super-2 number, since 2×31799009² = 2022353946764162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31799003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12332 + ... + 14685.

It is an arithmetic number, because the mean of its divisors is an integer number (4376916).

Almost surely, 2^31799009 is an apocalyptic number.

It is an amenable number.

31799009 is a deficient number, since it is larger than the sum of its proper divisors (3216319).

31799009 is a wasteful number, since it uses less digits than its factorization.

31799009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27135.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 31799009 is about 5639.0610033941. The cubic root of 31799009 is about 316.8141194488.

The spelling of 31799009 in words is "thirty-one million, seven hundred ninety-nine thousand, nine".