39963949 has 4 divisors (see below), whose sum is σ = 41701536. Its totient is φ = 38226364.

The previous prime is 39963941. The next prime is 39963953. The reversal of 39963949 is 94936993.

39963949 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94936993 = 17 ⋅5584529.

It is a cyclic number.

It is not a de Polignac number, because 39963949 - 2³ = 39963941 is a prime.

It is a super-3 number, since 3×39963949³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39963896 and 39963905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39963941) 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, 868759 + ... + 868804.

It is an arithmetic number, because the mean of its divisors is an integer number (10425384).

Almost surely, 2^39963949 is an apocalyptic number.

It is an amenable number.

39963949 is a deficient number, since it is larger than the sum of its proper divisors (1737587).

39963949 is a wasteful number, since it uses less digits than its factorization.

39963949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737586.

The product of its digits is 1417176, while the sum is 52.

The square root of 39963949 is about 6321.7045960722. The cubic root of 39963949 is about 341.8924145483.

The spelling of 39963949 in words is "thirty-nine million, nine hundred sixty-three thousand, nine hundred forty-nine".