31389349 has 8 divisors (see below), whose sum is σ = 33120000. Its totient is φ = 29666592.

The previous prime is 31389317. The next prime is 31389359. The reversal of 31389349 is 94398313.

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 31389349 - 2⁵ = 31389317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31389359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7377 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (4140000).

Almost surely, 2^31389349 is an apocalyptic number.

It is an amenable number.

31389349 is a deficient number, since it is larger than the sum of its proper divisors (1730651).

31389349 is a wasteful number, since it uses less digits than its factorization.

31389349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947.

The product of its digits is 69984, while the sum is 40.

The square root of 31389349 is about 5602.6198336136. The cubic root of 31389349 is about 315.4477515923.

The spelling of 31389349 in words is "thirty-one million, three hundred eighty-nine thousand, three hundred forty-nine".