39995393 has 2 divisors, whose sum is σ = 39995394. Its totient is φ = 39995392.

The previous prime is 39995359. The next prime is 39995401. The reversal of 39995393 is 39359993.

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., 22963264 + 17032129 = 4792^2 + 4127^2 .

It is an emirp because it is prime and its reverse (39359993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39995393 - 2¹⁰ = 39994369 is a prime.

It is a super-2 number, since 2×39995393² = 3199262922448898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39995303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19997696 + 19997697.

It is an arithmetic number, because the mean of its divisors is an integer number (19997697).

Almost surely, 2^39995393 is an apocalyptic number.

It is an amenable number.

39995393 is a deficient number, since it is larger than the sum of its proper divisors (1).

39995393 is an equidigital number, since it uses as much as digits as its factorization.

39995393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 885735, while the sum is 50.

The square root of 39995393 is about 6324.1910945195. The cubic root of 39995393 is about 341.9820590659.

The spelling of 39995393 in words is "thirty-nine million, nine hundred ninety-five thousand, three hundred ninety-three".