31673725 has 6 divisors (see below), whose sum is σ = 39275450. Its totient is φ = 25338960.

The previous prime is 31673711. The next prime is 31673729. The reversal of 31673725 is 52737613.

It can be written as a sum of positive squares in 3 ways, for example, as 737881 + 30935844 = 859^2 + 5562^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31673725 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31673729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 633450 + ... + 633499.

Almost surely, 2^31673725 is an apocalyptic number.

It is an amenable number.

31673725 is a deficient number, since it is larger than the sum of its proper divisors (7601725).

31673725 is a wasteful number, since it uses less digits than its factorization.

31673725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266959 (or 1266954 counting only the distinct ones).

The product of its digits is 26460, while the sum is 34.

The square root of 31673725 is about 5627.9414531425. The cubic root of 31673725 is about 316.3975028878.

The spelling of 31673725 in words is "thirty-one million, six hundred seventy-three thousand, seven hundred twenty-five".