31729066 has 8 divisors (see below), whose sum is σ = 47647620. Its totient is φ = 15846528.

The previous prime is 31729057. The next prime is 31729067. The reversal of 31729066 is 66092713.

It can be written as a sum of positive squares in 2 ways, for example, as 27867841 + 3861225 = 5279^2 + 1965^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31729067) 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, 6681 + ... + 10396.

Almost surely, 2^31729066 is an apocalyptic number.

31729066 is a deficient number, since it is larger than the sum of its proper divisors (15918554).

31729066 is a wasteful number, since it uses less digits than its factorization.

31729066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18008.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 31729066 is about 5632.8559363790. The cubic root of 31729066 is about 316.5816677994.

The spelling of 31729066 in words is "thirty-one million, seven hundred twenty-nine thousand, sixty-six".