31730769 has 12 divisors (see below), whose sum is σ = 52381056. Its totient is φ = 18131832.

The previous prime is 31730759. The next prime is 31730771. The reversal of 31730769 is 96703713.

It is not a de Polignac number, because 31730769 - 2⁴ = 31730753 is a prime.

It is a super-3 number, since 3×31730769³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31730759) 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 11 ways as a sum of consecutive naturals, for example, 251769 + ... + 251894.

It is an arithmetic number, because the mean of its divisors is an integer number (4365088).

Almost surely, 2^31730769 is an apocalyptic number.

It is an amenable number.

31730769 is a deficient number, since it is larger than the sum of its proper divisors (20650287).

31730769 is a wasteful number, since it uses less digits than its factorization.

31730769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503676 (or 503673 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 31730769 is about 5633.0071010074. The cubic root of 31730769 is about 316.5873316801.

The spelling of 31730769 in words is "thirty-one million, seven hundred thirty thousand, seven hundred sixty-nine".