39491297 has 2 divisors, whose sum is σ = 39491298. Its totient is φ = 39491296.

The previous prime is 39491269. The next prime is 39491311. The reversal of 39491297 is 79219493.

39491297 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., 36772096 + 2719201 = 6064^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 39491297 - 2⁸ = 39491041 is a prime.

It is not a weakly prime, because it can be changed into another prime (39491227) 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, 19745648 + 19745649.

It is an arithmetic number, because the mean of its divisors is an integer number (19745649).

Almost surely, 2^39491297 is an apocalyptic number.

It is an amenable number.

39491297 is a deficient number, since it is larger than the sum of its proper divisors (1).

39491297 is an equidigital number, since it uses as much as digits as its factorization.

39491297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 39491297 is about 6284.2101333421. The cubic root of 39491297 is about 340.5392164756.

The spelling of 39491297 in words is "thirty-nine million, four hundred ninety-one thousand, two hundred ninety-seven".