31845349 has 4 divisors (see below), whose sum is σ = 33521440. Its totient is φ = 30169260.

The previous prime is 31845329. The next prime is 31845371. The reversal of 31845349 is 94354813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94354813 = 7 ⋅13479259.

It is a cyclic number.

It is not a de Polignac number, because 31845349 - 2¹⁵ = 31812581 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 (31845329) 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 3 ways as a sum of consecutive naturals, for example, 838017 + ... + 838054.

It is an arithmetic number, because the mean of its divisors is an integer number (8380360).

Almost surely, 2^31845349 is an apocalyptic number.

It is an amenable number.

31845349 is a deficient number, since it is larger than the sum of its proper divisors (1676091).

31845349 is a wasteful number, since it uses less digits than its factorization.

31845349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676090.

The product of its digits is 51840, while the sum is 37.

The square root of 31845349 is about 5643.1683476572. The cubic root of 31845349 is about 316.9679401811.

The spelling of 31845349 in words is "thirty-one million, eight hundred forty-five thousand, three hundred forty-nine".