31970489 has 8 divisors (see below), whose sum is σ = 33965568. Its totient is φ = 29988160.

The previous prime is 31970473. The next prime is 31970503. The reversal of 31970489 is 98407913.

It is a happy number.

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 31970489 - 2⁴ = 31970473 is a prime.

It is a super-2 number, since 2×31970489² = 2044224333798242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31970459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2264 + ... + 8310.

It is an arithmetic number, because the mean of its divisors is an integer number (4245696).

Almost surely, 2^31970489 is an apocalyptic number.

It is an amenable number.

31970489 is a deficient number, since it is larger than the sum of its proper divisors (1995079).

31970489 is a wasteful number, since it uses less digits than its factorization.

31970489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 31970489 is about 5654.2452193020. The cubic root of 31970489 is about 317.3825849759.

The spelling of 31970489 in words is "thirty-one million, nine hundred seventy thousand, four hundred eighty-nine".