39245939 has 2 divisors, whose sum is σ = 39245940. Its totient is φ = 39245938.

The previous prime is 39245891. The next prime is 39245977. The reversal of 39245939 is 93954293.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39245939 - 2⁸ = 39245683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39245939.

It is not a weakly prime, because it can be changed into another prime (39245989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19622969 + 19622970.

It is an arithmetic number, because the mean of its divisors is an integer number (19622970).

Almost surely, 2^39245939 is an apocalyptic number.

39245939 is a deficient number, since it is larger than the sum of its proper divisors (1).

39245939 is an equidigital number, since it uses as much as digits as its factorization.

39245939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 44.

The square root of 39245939 is about 6264.6579316033. The cubic root of 39245939 is about 339.8324982316.

The spelling of 39245939 in words is "thirty-nine million, two hundred forty-five thousand, nine hundred thirty-nine".