39138497 has 2 divisors, whose sum is σ = 39138498. Its totient is φ = 39138496.

The previous prime is 39138493. The next prime is 39138527. The reversal of 39138497 is 79483193.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 961 = 6256^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138497 - 2² = 39138493 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39138493) 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, 19569248 + 19569249.

It is an arithmetic number, because the mean of its divisors is an integer number (19569249).

Almost surely, 2^39138497 is an apocalyptic number.

It is an amenable number.

39138497 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138497 is an equidigital number, since it uses as much as digits as its factorization.

39138497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 39138497 is about 6256.0768057945. The cubic root of 39138497 is about 339.5220996327.

The spelling of 39138497 in words is "thirty-nine million, one hundred thirty-eight thousand, four hundred ninety-seven".