39859949 has 4 divisors (see below), whose sum is σ = 41234460. Its totient is φ = 38485440.

The previous prime is 39859933. The next prime is 39859957. The reversal of 39859949 is 94995893.

39859949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94995893 = 41 ⋅2316973.

It can be written as a sum of positive squares in 2 ways, for example, as 15288100 + 24571849 = 3910^2 + 4957^2 .

It is a cyclic number.

It is not a de Polignac number, because 39859949 - 2⁴ = 39859933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39859894 and 39859903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39859979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687212 + ... + 687269.

It is an arithmetic number, because the mean of its divisors is an integer number (10308615).

Almost surely, 2^39859949 is an apocalyptic number.

It is an amenable number.

39859949 is a deficient number, since it is larger than the sum of its proper divisors (1374511).

39859949 is a wasteful number, since it uses less digits than its factorization.

39859949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374510.

The product of its digits is 3149280, while the sum is 56.

The square root of 39859949 is about 6313.4736080861. The cubic root of 39859949 is about 341.5955828589.

The spelling of 39859949 in words is "thirty-nine million, eight hundred fifty-nine thousand, nine hundred forty-nine".