31425697 has 8 divisors (see below), whose sum is σ = 31954976. Its totient is φ = 30899232.

The previous prime is 31425683. The next prime is 31425727. The reversal of 31425697 is 79652413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31425697 - 2¹¹ = 31423649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31425397) 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 7 ways as a sum of consecutive naturals, for example, 39538 + ... + 40324.

It is an arithmetic number, because the mean of its divisors is an integer number (3994372).

Almost surely, 2^31425697 is an apocalyptic number.

It is an amenable number.

31425697 is a deficient number, since it is larger than the sum of its proper divisors (529279).

31425697 is an equidigital number, since it uses as much as digits as its factorization.

31425697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407.

The product of its digits is 45360, while the sum is 37.

The square root of 31425697 is about 5605.8627346734. The cubic root of 31425697 is about 315.5694645549.

The spelling of 31425697 in words is "thirty-one million, four hundred twenty-five thousand, six hundred ninety-seven".