31989698 has 8 divisors (see below), whose sum is σ = 51675708. Its totient is φ = 14764464.

The previous prime is 31989691. The next prime is 31989701. The reversal of 31989698 is 89698913.

It can be written as a sum of positive squares in 2 ways, for example, as 24930049 + 7059649 = 4993^2 + 2657^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31989691) 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, 615161 + ... + 615212.

Almost surely, 2^31989698 is an apocalyptic number.

31989698 is a deficient number, since it is larger than the sum of its proper divisors (19686010).

31989698 is a wasteful number, since it uses less digits than its factorization.

31989698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230388.

The product of its digits is 839808, while the sum is 53.

The square root of 31989698 is about 5655.9435994359. The cubic root of 31989698 is about 317.4461371418.

The spelling of 31989698 in words is "thirty-one million, nine hundred eighty-nine thousand, six hundred ninety-eight".