39129973 has 2 divisors, whose sum is σ = 39129974. Its totient is φ = 39129972.

The previous prime is 39129947. The next prime is 39129983. The reversal of 39129973 is 37992193.

39129973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 18852964 = 4503^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 39129973 - 2⁵ = 39129941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39129983) 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, 19564986 + 19564987.

It is an arithmetic number, because the mean of its divisors is an integer number (19564987).

Almost surely, 2^39129973 is an apocalyptic number.

It is an amenable number.

39129973 is a deficient number, since it is larger than the sum of its proper divisors (1).

39129973 is an equidigital number, since it uses as much as digits as its factorization.

39129973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 39129973 is about 6255.3955110768. The cubic root of 39129973 is about 339.4974495931.

The spelling of 39129973 in words is "thirty-nine million, one hundred twenty-nine thousand, nine hundred seventy-three".