31949943 has 4 divisors (see below), whose sum is σ = 42599928. Its totient is φ = 21299960.

The previous prime is 31949941. The next prime is 31949977. The reversal of 31949943 is 34994913.

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

It is a cyclic number.

It is not a de Polignac number, because 31949943 - 2¹ = 31949941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31949895 and 31949904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31949941) 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, 5324988 + ... + 5324993.

It is an arithmetic number, because the mean of its divisors is an integer number (10649982).

Almost surely, 2^31949943 is an apocalyptic number.

31949943 is a deficient number, since it is larger than the sum of its proper divisors (10649985).

31949943 is a wasteful number, since it uses less digits than its factorization.

31949943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10649984.

The product of its digits is 104976, while the sum is 42.

The square root of 31949943 is about 5652.4280623463. The cubic root of 31949943 is about 317.3145812199.

The spelling of 31949943 in words is "thirty-one million, nine hundred forty-nine thousand, nine hundred forty-three".