39998345 has 4 divisors (see below), whose sum is σ = 47998020. Its totient is φ = 31998672.

The previous prime is 39998341. The next prime is 39998351. The reversal of 39998345 is 54389993.

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 30382144 + 9616201 = 5512^2 + 3101^2 .

It is a cyclic number.

It is not a de Polignac number, because 39998345 - 2² = 39998341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39998293 and 39998302.

It is not an unprimeable number, because it can be changed into a prime (39998341) 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 in 3 ways as a sum of consecutive naturals, for example, 3999830 + ... + 3999839.

It is an arithmetic number, because the mean of its divisors is an integer number (11999505).

Almost surely, 2^39998345 is an apocalyptic number.

It is an amenable number.

39998345 is a deficient number, since it is larger than the sum of its proper divisors (7999675).

39998345 is an equidigital number, since it uses as much as digits as its factorization.

39998345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999674.

The product of its digits is 1049760, while the sum is 50.

The square root of 39998345 is about 6324.4244797452. The cubic root of 39998345 is about 341.9904725866.

The spelling of 39998345 in words is "thirty-nine million, nine hundred ninety-eight thousand, three hundred forty-five".