39803811947 has 2 divisors, whose sum is σ = 39803811948. Its totient is φ = 39803811946.

The previous prime is 39803811871. The next prime is 39803811967. The reversal of 39803811947 is 74911830893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39803811947 is a prime.

It is not a weakly prime, because it can be changed into another prime (39803811967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19901905973 + 19901905974.

It is an arithmetic number, because the mean of its divisors is an integer number (19901905974).

Almost surely, 2^39803811947 is an apocalyptic number.

39803811947 is a deficient number, since it is larger than the sum of its proper divisors (1).

39803811947 is an equidigital number, since it uses as much as digits as its factorization.

39803811947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 39803811947 in words is "thirty-nine billion, eight hundred three million, eight hundred eleven thousand, nine hundred forty-seven".