39952729 has 2 divisors, whose sum is σ = 39952730. Its totient is φ = 39952728.

The previous prime is 39952727. The next prime is 39952741. The reversal of 39952729 is 92725993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29680704 + 10272025 = 5448^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 39952729 - 2¹ = 39952727 is a prime.

Together with 39952727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39952727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19976364 + 19976365.

It is an arithmetic number, because the mean of its divisors is an integer number (19976365).

Almost surely, 2^39952729 is an apocalyptic number.

It is an amenable number.

39952729 is a deficient number, since it is larger than the sum of its proper divisors (1).

39952729 is an equidigital number, since it uses as much as digits as its factorization.

39952729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 46.

The square root of 39952729 is about 6320.8171148990. The cubic root of 39952729 is about 341.8604157758.

It can be divided in two parts, 3995 and 2729, that added together give a square (6724 = 82²).

The spelling of 39952729 in words is "thirty-nine million, nine hundred fifty-two thousand, seven hundred twenty-nine".