39678997 has 2 divisors, whose sum is σ = 39678998. Its totient is φ = 39678996.

The previous prime is 39678953. The next prime is 39679027. The reversal of 39678997 is 79987693.

39678997 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., 35892081 + 3786916 = 5991^2 + 1946^2 .

It is a cyclic number.

It is not a de Polignac number, because 39678997 - 2⁷ = 39678869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39678907) 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, 19839498 + 19839499.

It is an arithmetic number, because the mean of its divisors is an integer number (19839499).

Almost surely, 2^39678997 is an apocalyptic number.

It is an amenable number.

39678997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39678997 is an equidigital number, since it uses as much as digits as its factorization.

39678997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 58.

The square root of 39678997 is about 6299.1266855017. The cubic root of 39678997 is about 341.0778854495.

The spelling of 39678997 in words is "thirty-nine million, six hundred seventy-eight thousand, nine hundred ninety-seven".