31061289 has 8 divisors (see below), whose sum is σ = 47331520. Its totient is φ = 17749296.

The previous prime is 31061269. The next prime is 31061297. The reversal of 31061289 is 98216013.

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

It is not a de Polignac number, because 31061289 - 2¹³ = 31053097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31061209) 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, 739534 + ... + 739575.

It is an arithmetic number, because the mean of its divisors is an integer number (5916440).

Almost surely, 2^31061289 is an apocalyptic number.

It is an amenable number.

31061289 is a deficient number, since it is larger than the sum of its proper divisors (16270231).

31061289 is a wasteful number, since it uses less digits than its factorization.

31061289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479119.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 31061289 is about 5573.2655597953. The cubic root of 31061289 is about 314.3449526963.

The spelling of 31061289 in words is "thirty-one million, sixty-one thousand, two hundred eighty-nine".