39800549 has 4 divisors (see below), whose sum is σ = 40345836. Its totient is φ = 39255264.

The previous prime is 39800543. The next prime is 39800561. The reversal of 39800549 is 94500893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21224449 + 18576100 = 4607^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 39800549 - 2¹⁶ = 39735013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39800543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272534 + ... + 272679.

It is an arithmetic number, because the mean of its divisors is an integer number (10086459).

Almost surely, 2^39800549 is an apocalyptic number.

It is an amenable number.

39800549 is a deficient number, since it is larger than the sum of its proper divisors (545287).

39800549 is an equidigital number, since it uses as much as digits as its factorization.

39800549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545286.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 39800549 is about 6308.7676292601. The cubic root of 39800549 is about 341.4258145768.

The spelling of 39800549 in words is "thirty-nine million, eight hundred thousand, five hundred forty-nine".