31738949 has 16 divisors (see below), whose sum is σ = 38594880. Its totient is φ = 25724160.

The previous prime is 31738939. The next prime is 31738957. The reversal of 31738949 is 94983713.

It is a happy number.

It is not a de Polignac number, because 31738949 - 2²⁴ = 14961733 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 (31738939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (2412180).

Almost surely, 2^31738949 is an apocalyptic number.

It is an amenable number.

31738949 is a deficient number, since it is larger than the sum of its proper divisors (6855931).

31738949 is a wasteful number, since it uses less digits than its factorization.

31738949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980.

The product of its digits is 163296, while the sum is 44.

The square root of 31738949 is about 5633.7331317697. The cubic root of 31738949 is about 316.6145341080.

The spelling of 31738949 in words is "thirty-one million, seven hundred thirty-eight thousand, nine hundred forty-nine".