3939497 has 2 divisors, whose sum is σ = 3939498. Its totient is φ = 3939496.

The previous prime is 3939473. The next prime is 3939499. The reversal of 3939497 is 7949393.

It is a happy number.

3939497 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., 3759721 + 179776 = 1939^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 3939497 - 2⁶ = 3939433 is a prime.

It is a super-2 number, since 2×3939497² = 31039273226018, which contains 22 as substring.

Together with 3939499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3939499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969748 + 1969749.

It is an arithmetic number, because the mean of its divisors is an integer number (1969749).

Almost surely, 2^3939497 is an apocalyptic number.

It is an amenable number.

3939497 is a deficient number, since it is larger than the sum of its proper divisors (1).

3939497 is an equidigital number, since it uses as much as digits as its factorization.

3939497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 44.

The square root of 3939497 is about 1984.8166162142. The cubic root of 3939497 is about 157.9356812393.

The spelling of 3939497 in words is "three million, nine hundred thirty-nine thousand, four hundred ninety-seven".