39172640029 has 2 divisors, whose sum is σ = 39172640030. Its totient is φ = 39172640028.

The previous prime is 39172640027. The next prime is 39172640057. The reversal of 39172640029 is 92004627193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24367834404 + 14804805625 = 156102^2 + 121675^2 .

It is a cyclic number.

It is not a de Polignac number, because 39172640029 - 2¹ = 39172640027 is a prime.

It is a super-2 number, since 2×39172640029² (a number of 22 digits) contains 22 as substring.

Together with 39172640027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39172640027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19586320014 + 19586320015.

It is an arithmetic number, because the mean of its divisors is an integer number (19586320015).

Almost surely, 2^39172640029 is an apocalyptic number.

It is an amenable number.

39172640029 is a deficient number, since it is larger than the sum of its proper divisors (1).

39172640029 is an equidigital number, since it uses as much as digits as its factorization.

39172640029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 39172640029 in words is "thirty-nine billion, one hundred seventy-two million, six hundred forty thousand, twenty-nine".