31989441 has 8 divisors (see below), whose sum is σ = 46530144. Its totient is φ = 19387520.

The previous prime is 31989439. The next prime is 31989443. The reversal of 31989441 is 14498913.

It is an interprime number because it is at equal distance from previous prime (31989439) and next prime (31989443).

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 31989441 - 2¹ = 31989439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31989441.

It is not an unprimeable number, because it can be changed into a prime (31989443) 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, 484656 + ... + 484721.

It is an arithmetic number, because the mean of its divisors is an integer number (5816268).

Almost surely, 2^31989441 is an apocalyptic number.

It is an amenable number.

31989441 is a deficient number, since it is larger than the sum of its proper divisors (14540703).

31989441 is a wasteful number, since it uses less digits than its factorization.

31989441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969391.

The product of its digits is 31104, while the sum is 39.

The square root of 31989441 is about 5655.9208799275. The cubic root of 31989441 is about 317.4452870361.

The spelling of 31989441 in words is "thirty-one million, nine hundred eighty-nine thousand, four hundred forty-one".