39752129693 has 4 divisors (see below), whose sum is σ = 39851262588. Its totient is φ = 39652996800.

The previous prime is 39752129647. The next prime is 39752129701. The reversal of 39752129693 is 39692125793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29260839364 + 10491290329 = 171058^2 + 102427^2 .

It is a cyclic number.

It is not a de Polignac number, because 39752129693 - 2¹⁸ = 39751867549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39752129293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49565846 + ... + 49566647.

It is an arithmetic number, because the mean of its divisors is an integer number (9962815647).

Almost surely, 2^39752129693 is an apocalyptic number.

It is an amenable number.

39752129693 is a deficient number, since it is larger than the sum of its proper divisors (99132895).

39752129693 is an equidigital number, since it uses as much as digits as its factorization.

39752129693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99132894.

The product of its digits is 5511240, while the sum is 56.

The spelling of 39752129693 in words is "thirty-nine billion, seven hundred fifty-two million, one hundred twenty-nine thousand, six hundred ninety-three".