39940932173 has 2 divisors, whose sum is σ = 39940932174. Its totient is φ = 39940932172.

The previous prime is 39940932113. The next prime is 39940932203. The reversal of 39940932173 is 37123904993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27841592164 + 12099340009 = 166858^2 + 109997^2 .

It is a cyclic number.

It is not a de Polignac number, because 39940932173 - 2¹⁴ = 39940915789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39940932113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19970466086 + 19970466087.

It is an arithmetic number, because the mean of its divisors is an integer number (19970466087).

Almost surely, 2^39940932173 is an apocalyptic number.

It is an amenable number.

39940932173 is a deficient number, since it is larger than the sum of its proper divisors (1).

39940932173 is an equidigital number, since it uses as much as digits as its factorization.

39940932173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The spelling of 39940932173 in words is "thirty-nine billion, nine hundred forty million, nine hundred thirty-two thousand, one hundred seventy-three".