39445697 has 2 divisors, whose sum is σ = 39445698. Its totient is φ = 39445696.

The previous prime is 39445687. The next prime is 39445699. The reversal of 39445697 is 79654493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38950081 + 495616 = 6241^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 39445697 - 2⁶ = 39445633 is a prime.

Together with 39445699, 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 (39445699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19722848 + 19722849.

It is an arithmetic number, because the mean of its divisors is an integer number (19722849).

Almost surely, 2^39445697 is an apocalyptic number.

It is an amenable number.

39445697 is a deficient number, since it is larger than the sum of its proper divisors (1).

39445697 is an equidigital number, since it uses as much as digits as its factorization.

39445697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 39445697 is about 6280.5809444668. The cubic root of 39445697 is about 340.4080941764.

The spelling of 39445697 in words is "thirty-nine million, four hundred forty-five thousand, six hundred ninety-seven".