39740969 has 2 divisors, whose sum is σ = 39740970. Its totient is φ = 39740968.

The previous prime is 39740959. The next prime is 39740971. The reversal of 39740969 is 96904793.

39740969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31214569 + 8526400 = 5587^2 + 2920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39740969 is a prime.

It is a super-2 number, since 2×39740969² = 3158689234117922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 39740971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39740929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19870484 + 19870485.

It is an arithmetic number, because the mean of its divisors is an integer number (19870485).

Almost surely, 2^39740969 is an apocalyptic number.

It is an amenable number.

39740969 is a deficient number, since it is larger than the sum of its proper divisors (1).

39740969 is an equidigital number, since it uses as much as digits as its factorization.

39740969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 39740969 is about 6304.0438608880. The cubic root of 39740969 is about 341.2553620790.

The spelling of 39740969 in words is "thirty-nine million, seven hundred forty thousand, nine hundred sixty-nine".