39490007749 has 2 divisors, whose sum is σ = 39490007750. Its totient is φ = 39490007748.

The previous prime is 39490007743. The next prime is 39490007813. The reversal of 39490007749 is 94770009493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22120612900 + 17369394849 = 148730^2 + 131793^2 .

It is a cyclic number.

It is not a de Polignac number, because 39490007749 - 2¹³ = 39489999557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39490007696 and 39490007705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39490007743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19745003874 + 19745003875.

It is an arithmetic number, because the mean of its divisors is an integer number (19745003875).

Almost surely, 2^39490007749 is an apocalyptic number.

It is an amenable number.

39490007749 is a deficient number, since it is larger than the sum of its proper divisors (1).

39490007749 is an equidigital number, since it uses as much as digits as its factorization.

39490007749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The spelling of 39490007749 in words is "thirty-nine billion, four hundred ninety million, seven thousand, seven hundred forty-nine".