39879149 has 2 divisors, whose sum is σ = 39879150. Its totient is φ = 39879148.

The previous prime is 39879083. The next prime is 39879167. The reversal of 39879149 is 94197893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37429924 + 2449225 = 6118^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 39879149 - 2⁸ = 39878893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39879097 and 39879106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39879179) 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, 19939574 + 19939575.

It is an arithmetic number, because the mean of its divisors is an integer number (19939575).

Almost surely, 2^39879149 is an apocalyptic number.

It is an amenable number.

39879149 is a deficient number, since it is larger than the sum of its proper divisors (1).

39879149 is an equidigital number, since it uses as much as digits as its factorization.

39879149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 39879149 is about 6314.9939825783. The cubic root of 39879149 is about 341.6504213837.

The spelling of 39879149 in words is "thirty-nine million, eight hundred seventy-nine thousand, one hundred forty-nine".