31729049 has 8 divisors (see below), whose sum is σ = 34957440. Its totient is φ = 28558000.

The previous prime is 31729043. The next prime is 31729051. The reversal of 31729049 is 94092713.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31729049 - 2²⁰ = 30680473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31729043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13169 + ... + 15390.

It is an arithmetic number, because the mean of its divisors is an integer number (4369680).

Almost surely, 2^31729049 is an apocalyptic number.

It is an amenable number.

31729049 is a deficient number, since it is larger than the sum of its proper divisors (3228391).

31729049 is a wasteful number, since it uses less digits than its factorization.

31729049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28671.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 31729049 is about 5632.8544273752. The cubic root of 31729049 is about 316.5816112593.

It can be divided in two parts, 3172 and 9049, that added together give a palindrome (12221).

The spelling of 31729049 in words is "thirty-one million, seven hundred twenty-nine thousand, forty-nine".