31849147 has 4 divisors (see below), whose sum is σ = 34744536. Its totient is φ = 28953760.

The previous prime is 31849141. The next prime is 31849157. The reversal of 31849147 is 74194813.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31849147 - 2¹¹ = 31847099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31849141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447678 + ... + 1447699.

It is an arithmetic number, because the mean of its divisors is an integer number (8686134).

Almost surely, 2^31849147 is an apocalyptic number.

31849147 is a deficient number, since it is larger than the sum of its proper divisors (2895389).

31849147 is a wasteful number, since it uses less digits than its factorization.

31849147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895388.

The product of its digits is 24192, while the sum is 37.

The square root of 31849147 is about 5643.5048507111. The cubic root of 31849147 is about 316.9805406227.

The spelling of 31849147 in words is "thirty-one million, eight hundred forty-nine thousand, one hundred forty-seven".