39963749 has 8 divisors (see below), whose sum is σ = 46535040. Its totient is φ = 33608016.

The previous prime is 39963739. The next prime is 39963761. The reversal of 39963749 is 94736993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39963749 - 2⁴ = 39963733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39963697 and 39963706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39963739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53489 + ... + 54230.

It is an arithmetic number, because the mean of its divisors is an integer number (5816880).

Almost surely, 2^39963749 is an apocalyptic number.

It is an amenable number.

39963749 is a deficient number, since it is larger than the sum of its proper divisors (6571291).

39963749 is a wasteful number, since it uses less digits than its factorization.

39963749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107779.

The product of its digits is 1102248, while the sum is 50.

The square root of 39963749 is about 6321.6887775341. The cubic root of 39963749 is about 341.8918442126.

The spelling of 39963749 in words is "thirty-nine million, nine hundred sixty-three thousand, seven hundred forty-nine".