31425673 has 4 divisors (see below), whose sum is σ = 33274260. Its totient is φ = 29577088.

The previous prime is 31425643. The next prime is 31425683. The reversal of 31425673 is 37652413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28174864 + 3250809 = 5308^2 + 1803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31425673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31425643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924268 + ... + 924301.

It is an arithmetic number, because the mean of its divisors is an integer number (8318565).

Almost surely, 2^31425673 is an apocalyptic number.

It is an amenable number.

31425673 is a deficient number, since it is larger than the sum of its proper divisors (1848587).

31425673 is a wasteful number, since it uses less digits than its factorization.

31425673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848586.

The product of its digits is 15120, while the sum is 31.

The square root of 31425673 is about 5605.8605940569. The cubic root of 31425673 is about 315.5693842208.

The spelling of 31425673 in words is "thirty-one million, four hundred twenty-five thousand, six hundred seventy-three".