39472729 has 2 divisors, whose sum is σ = 39472730. Its totient is φ = 39472728.

The previous prime is 39472721. The next prime is 39472781. The reversal of 39472729 is 92727493.

It is a happy number.

39472729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37847104 + 1625625 = 6152^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 39472729 - 2³ = 39472721 is a prime.

It is not a weakly prime, because it can be changed into another prime (39472721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19736364 + 19736365.

It is an arithmetic number, because the mean of its divisors is an integer number (19736365).

Almost surely, 2^39472729 is an apocalyptic number.

It is an amenable number.

39472729 is a deficient number, since it is larger than the sum of its proper divisors (1).

39472729 is an equidigital number, since it uses as much as digits as its factorization.

39472729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 39472729 is about 6282.7326061197. The cubic root of 39472729 is about 340.4858365842.

The spelling of 39472729 in words is "thirty-nine million, four hundred seventy-two thousand, seven hundred twenty-nine".