31308669 has 12 divisors (see below), whose sum is σ = 51684256. Its totient is φ = 17890632.

The previous prime is 31308647. The next prime is 31308689. The reversal of 31308669 is 96680313.

It is a happy number.

It is not a de Polignac number, because 31308669 - 2¹⁹ = 30784381 is a prime.

It is a super-2 number, since 2×31308669² = 1960465509103122, 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 (31308689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248419 + ... + 248544.

Almost surely, 2^31308669 is an apocalyptic number.

It is an amenable number.

31308669 is a deficient number, since it is larger than the sum of its proper divisors (20375587).

31308669 is a wasteful number, since it uses less digits than its factorization.

31308669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496976 (or 496973 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 31308669 is about 5595.4149980140. The cubic root of 31308669 is about 315.1772547350.

The spelling of 31308669 in words is "thirty-one million, three hundred eight thousand, six hundred sixty-nine".