39808541 has 2 divisors, whose sum is σ = 39808542. Its totient is φ = 39808540.

The previous prime is 39808523. The next prime is 39808567. The reversal of 39808541 is 14580893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 10106041 = 5450^2 + 3179^2 .

It is a cyclic number.

It is not a de Polignac number, because 39808541 - 2²² = 35614237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39808495 and 39808504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39805541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19904270 + 19904271.

It is an arithmetic number, because the mean of its divisors is an integer number (19904271).

Almost surely, 2^39808541 is an apocalyptic number.

It is an amenable number.

39808541 is a deficient number, since it is larger than the sum of its proper divisors (1).

39808541 is an equidigital number, since it uses as much as digits as its factorization.

39808541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 39808541 is about 6309.4010016800. The cubic root of 39808541 is about 341.4486659575.

It can be divided in two parts, 3980 and 8541, that added together give a palindrome (12521).

The spelling of 39808541 in words is "thirty-nine million, eight hundred eight thousand, five hundred forty-one".