39797993 has 2 divisors, whose sum is σ = 39797994. Its totient is φ = 39797992.

The previous prime is 39797963. The next prime is 39797999. The reversal of 39797993 is 39979793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29888089 + 9909904 = 5467^2 + 3148^2 .

It is a cyclic number.

It is not a de Polignac number, because 39797993 - 2⁶ = 39797929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39797999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19898996 + 19898997.

It is an arithmetic number, because the mean of its divisors is an integer number (19898997).

Almost surely, 2^39797993 is an apocalyptic number.

It is an amenable number.

39797993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39797993 is an equidigital number, since it uses as much as digits as its factorization.

39797993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2893401, while the sum is 56.

The square root of 39797993 is about 6308.5650507861. The cubic root of 39797993 is about 341.4185056068.

The spelling of 39797993 in words is "thirty-nine million, seven hundred ninety-seven thousand, nine hundred ninety-three".