39856361 has 2 divisors, whose sum is σ = 39856362. Its totient is φ = 39856360.

The previous prime is 39856307. The next prime is 39856367. The reversal of 39856361 is 16365893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 15452761 = 4940^2 + 3931^2 .

It is a cyclic number.

It is not a de Polignac number, because 39856361 - 2¹⁰ = 39855337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (39856367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19928180 + 19928181.

It is an arithmetic number, because the mean of its divisors is an integer number (19928181).

Almost surely, 2^39856361 is an apocalyptic number.

It is an amenable number.

39856361 is a deficient number, since it is larger than the sum of its proper divisors (1).

39856361 is an equidigital number, since it uses as much as digits as its factorization.

39856361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 39856361 is about 6313.1894474980. The cubic root of 39856361 is about 341.5853329568.

The spelling of 39856361 in words is "thirty-nine million, eight hundred fifty-six thousand, three hundred sixty-one".