39889697 has 2 divisors, whose sum is σ = 39889698. Its totient is φ = 39889696.

The previous prime is 39889693. The next prime is 39889709. The reversal of 39889697 is 79698893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38887696 + 1002001 = 6236^2 + 1001^2 .

It is a cyclic number.

It is not a de Polignac number, because 39889697 - 2² = 39889693 is a prime.

It is not a weakly prime, because it can be changed into another prime (39889691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19944848 + 19944849.

It is an arithmetic number, because the mean of its divisors is an integer number (19944849).

Almost surely, 2^39889697 is an apocalyptic number.

It is an amenable number.

39889697 is a deficient number, since it is larger than the sum of its proper divisors (1).

39889697 is an equidigital number, since it uses as much as digits as its factorization.

39889697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 39889697 is about 6315.8290825512. The cubic root of 39889697 is about 341.6805408075.

The spelling of 39889697 in words is "thirty-nine million, eight hundred eighty-nine thousand, six hundred ninety-seven".