31320969 has 8 divisors (see below), whose sum is σ = 42230880. Its totient is φ = 20645856.

The previous prime is 31320967. The next prime is 31320973. The reversal of 31320969 is 96902313.

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

It is not a de Polignac number, because 31320969 - 2¹ = 31320967 is a prime.

It is a super-2 number, since 2×31320969² = 1962006198197922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31320967) 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, 58387 + ... + 58920.

It is an arithmetic number, because the mean of its divisors is an integer number (5278860).

Almost surely, 2^31320969 is an apocalyptic number.

It is an amenable number.

31320969 is a deficient number, since it is larger than the sum of its proper divisors (10909911).

31320969 is a wasteful number, since it uses less digits than its factorization.

31320969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117399.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 31320969 is about 5596.5140042709. The cubic root of 31320969 is about 315.2185230994.

The spelling of 31320969 in words is "thirty-one million, three hundred twenty thousand, nine hundred sixty-nine".