39842401 has 2 divisors, whose sum is σ = 39842402. Its totient is φ = 39842400.

The previous prime is 39842399. The next prime is 39842423. The reversal of 39842401 is 10424893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27836176 + 12006225 = 5276^2 + 3465^2 .

It is a cyclic number.

It is not a de Polignac number, because 39842401 - 2¹ = 39842399 is a prime.

Together with 39842399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (39842501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19921200 + 19921201.

It is an arithmetic number, because the mean of its divisors is an integer number (19921201).

Almost surely, 2^39842401 is an apocalyptic number.

It is an amenable number.

39842401 is a deficient number, since it is larger than the sum of its proper divisors (1).

39842401 is an equidigital number, since it uses as much as digits as its factorization.

39842401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 39842401 is about 6312.0837288490. The cubic root of 39842401 is about 341.5454473277.

The spelling of 39842401 in words is "thirty-nine million, eight hundred forty-two thousand, four hundred one".