39861401 has 2 divisors, whose sum is σ = 39861402. Its totient is φ = 39861400.

The previous prime is 39861361. The next prime is 39861439. The reversal of 39861401 is 10416893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 14055001 = 5080^2 + 3749^2 .

It is an emirp because it is prime and its reverse (10416893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39861401 - 2¹⁸ = 39599257 is a prime.

It is a Chen prime.

It is equal to p_2425793 and since 39861401 and 2425793 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (39866401) 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, 19930700 + 19930701.

It is an arithmetic number, because the mean of its divisors is an integer number (19930701).

Almost surely, 2^39861401 is an apocalyptic number.

It is an amenable number.

39861401 is a deficient number, since it is larger than the sum of its proper divisors (1).

39861401 is an equidigital number, since it uses as much as digits as its factorization.

39861401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 39861401 is about 6313.5885992041. The cubic root of 39861401 is about 341.5997306378.

The spelling of 39861401 in words is "thirty-nine million, eight hundred sixty-one thousand, four hundred one".