39945067 has 2 divisors, whose sum is σ = 39945068. Its totient is φ = 39945066.

The previous prime is 39945047. The next prime is 39945079. The reversal of 39945067 is 76054993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39945067 - 2¹⁹ = 39420779 is a prime.

It is not a weakly prime, because it can be changed into another prime (39945047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972533 + 19972534.

It is an arithmetic number, because the mean of its divisors is an integer number (19972534).

Almost surely, 2^39945067 is an apocalyptic number.

39945067 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945067 is an equidigital number, since it uses as much as digits as its factorization.

39945067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 39945067 is about 6320.2109933134. The cubic root of 39945067 is about 341.8385607650.

The spelling of 39945067 in words is "thirty-nine million, nine hundred forty-five thousand, sixty-seven".