39679397 has 2 divisors, whose sum is σ = 39679398. Its totient is φ = 39679396.

The previous prime is 39679331. The next prime is 39679399. The reversal of 39679397 is 79397693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38950081 + 729316 = 6241^2 + 854^2 .

It is an emirp because it is prime and its reverse (79397693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39679397 - 2⁸ = 39679141 is a prime.

Together with 39679399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39679399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19839698 + 19839699.

It is an arithmetic number, because the mean of its divisors is an integer number (19839699).

Almost surely, 2^39679397 is an apocalyptic number.

It is an amenable number.

39679397 is a deficient number, since it is larger than the sum of its proper divisors (1).

39679397 is an equidigital number, since it uses as much as digits as its factorization.

39679397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1928934, while the sum is 53.

The square root of 39679397 is about 6299.1584358547. The cubic root of 39679397 is about 341.0790315697.

The spelling of 39679397 in words is "thirty-nine million, six hundred seventy-nine thousand, three hundred ninety-seven".