39520861 has 2 divisors, whose sum is σ = 39520862. Its totient is φ = 39520860.

The previous prime is 39520837. The next prime is 39520879. The reversal of 39520861 is 16802593.

39520861 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., 33419961 + 6100900 = 5781^2 + 2470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39520861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39520661) 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, 19760430 + 19760431.

It is an arithmetic number, because the mean of its divisors is an integer number (19760431).

Almost surely, 2^39520861 is an apocalyptic number.

It is an amenable number.

39520861 is a deficient number, since it is larger than the sum of its proper divisors (1).

39520861 is an equidigital number, since it uses as much as digits as its factorization.

39520861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 39520861 is about 6286.5619379753. The cubic root of 39520861 is about 340.6241735075.

The spelling of 39520861 in words is "thirty-nine million, five hundred twenty thousand, eight hundred sixty-one".