39953993 has 2 divisors, whose sum is σ = 39953994. Its totient is φ = 39953992.

The previous prime is 39953987. The next prime is 39953999. The reversal of 39953993 is 39935993.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (39953987) and next prime (39953999).

It can be written as a sum of positive squares in only one way, i.e., 31956409 + 7997584 = 5653^2 + 2828^2 .

It is an emirp because it is prime and its reverse (39935993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39953993 - 2¹⁴ = 39937609 is a prime.

It is not a weakly prime, because it can be changed into another prime (39953999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19976996 + 19976997.

It is an arithmetic number, because the mean of its divisors is an integer number (19976997).

Almost surely, 2^39953993 is an apocalyptic number.

It is an amenable number.

39953993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39953993 is an equidigital number, since it uses as much as digits as its factorization.

39953993 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 39953993 is about 6320.9171011808. The cubic root of 39953993 is about 341.8640209280.

The spelling of 39953993 in words is "thirty-nine million, nine hundred fifty-three thousand, nine hundred ninety-three".