31197969 has 24 divisors (see below), whose sum is σ = 49795200. Its totient is φ = 18663840.

The previous prime is 31197967. The next prime is 31197977. The reversal of 31197969 is 96979113.

It is not a de Polignac number, because 31197969 - 2¹ = 31197967 is a prime.

It is a super-2 number, since 2×31197969² = 1946626539449922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31197967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5827 + ... + 9815.

It is an arithmetic number, because the mean of its divisors is an integer number (2074800).

Almost surely, 2^31197969 is an apocalyptic number.

It is an amenable number.

31197969 is a deficient number, since it is larger than the sum of its proper divisors (18597231).

31197969 is a wasteful number, since it uses less digits than its factorization.

31197969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085 (or 4082 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 31197969 is about 5585.5142108852. The cubic root of 31197969 is about 314.8053521573.

The spelling of 31197969 in words is "thirty-one million, one hundred ninety-seven thousand, nine hundred sixty-nine".