39799855 has 4 divisors (see below), whose sum is σ = 47759832. Its totient is φ = 31839880.

The previous prime is 39799853. The next prime is 39799871. The reversal of 39799855 is 55899793.

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

It is not a de Polignac number, because 39799855 - 2¹ = 39799853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39799796 and 39799805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39799853) 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, 3979981 + ... + 3979990.

It is an arithmetic number, because the mean of its divisors is an integer number (11939958).

Almost surely, 2^39799855 is an apocalyptic number.

39799855 is a deficient number, since it is larger than the sum of its proper divisors (7959977).

39799855 is an equidigital number, since it uses as much as digits as its factorization.

39799855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7959976.

The product of its digits is 3061800, while the sum is 55.

The square root of 39799855 is about 6308.7126262020. The cubic root of 39799855 is about 341.4238300909.

The spelling of 39799855 in words is "thirty-nine million, seven hundred ninety-nine thousand, eight hundred fifty-five".