39991033 has 2 divisors, whose sum is σ = 39991034. Its totient is φ = 39991032.

The previous prime is 39991019. The next prime is 39991057. The reversal of 39991033 is 33019993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22250089 + 17740944 = 4717^2 + 4212^2 .

It is an emirp because it is prime and its reverse (33019993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39991033 - 2⁹ = 39990521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39990983 and 39991001.

It is not a weakly prime, because it can be changed into another prime (39991073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19995516 + 19995517.

It is an arithmetic number, because the mean of its divisors is an integer number (19995517).

Almost surely, 2^39991033 is an apocalyptic number.

It is an amenable number.

39991033 is a deficient number, since it is larger than the sum of its proper divisors (1).

39991033 is an equidigital number, since it uses as much as digits as its factorization.

39991033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 37.

The square root of 39991033 is about 6323.8463770082. The cubic root of 39991033 is about 341.9696318349.

The spelling of 39991033 in words is "thirty-nine million, nine hundred ninety-one thousand, thirty-three".