31493189 has 8 divisors (see below), whose sum is σ = 38760960. Its totient is φ = 24917616.

The previous prime is 31493171. The next prime is 31493191. The reversal of 31493189 is 98139413.

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 31493189 - 2⁸ = 31492933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31493689) 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, 172949 + ... + 173130.

It is an arithmetic number, because the mean of its divisors is an integer number (4845120).

Almost surely, 2^31493189 is an apocalyptic number.

It is an amenable number.

31493189 is a deficient number, since it is larger than the sum of its proper divisors (7267771).

31493189 is a wasteful number, since it uses less digits than its factorization.

31493189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346099.

The product of its digits is 23328, while the sum is 38.

The square root of 31493189 is about 5611.8792752517. The cubic root of 31493189 is about 315.7952159536.

The spelling of 31493189 in words is "thirty-one million, four hundred ninety-three thousand, one hundred eighty-nine".