39717945049 has 2 divisors, whose sum is σ = 39717945050. Its totient is φ = 39717945048.

The previous prime is 39717944993. The next prime is 39717945073. The reversal of 39717945049 is 94054971793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19949585049 + 19768360000 = 141243^2 + 140600^2 .

It is an emirp because it is prime and its reverse (94054971793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39717945049 - 2⁷ = 39717944921 is a prime.

It is a super-2 number, since 2×39717945049² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39717944984 and 39717945002.

It is not a weakly prime, because it can be changed into another prime (39717945649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19858972524 + 19858972525.

It is an arithmetic number, because the mean of its divisors is an integer number (19858972525).

Almost surely, 2^39717945049 is an apocalyptic number.

It is an amenable number.

39717945049 is a deficient number, since it is larger than the sum of its proper divisors (1).

39717945049 is an equidigital number, since it uses as much as digits as its factorization.

39717945049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 39717945049 in words is "thirty-nine billion, seven hundred seventeen million, nine hundred forty-five thousand, forty-nine".