31684429 has 12 divisors (see below), whose sum is σ = 37092864. Its totient is φ = 26984664.

The previous prime is 31684351. The next prime is 31684463. The reversal of 31684429 is 92448613.

It is not a de Polignac number, because 31684429 - 2⁹ = 31683917 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 (31684129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6004 + ... + 9970.

It is an arithmetic number, because the mean of its divisors is an integer number (3091072).

Almost surely, 2^31684429 is an apocalyptic number.

It is an amenable number.

31684429 is a deficient number, since it is larger than the sum of its proper divisors (5408435).

31684429 is a wasteful number, since it uses less digits than its factorization.

31684429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4137 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 31684429 is about 5628.8923421931. The cubic root of 31684429 is about 316.4331406015.

The spelling of 31684429 in words is "thirty-one million, six hundred eighty-four thousand, four hundred twenty-nine".