39749663 has 4 divisors (see below), whose sum is σ = 39794208. Its totient is φ = 39705120.

The previous prime is 39749659. The next prime is 39749683. The reversal of 39749663 is 36694793.

39749663 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.

It is a cyclic number.

It is not a de Polignac number, because 39749663 - 2² = 39749659 is a prime.

It is a super-2 number, since 2×39749663² = 3160071417227138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39749683) 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, 20906 + ... + 22727.

It is an arithmetic number, because the mean of its divisors is an integer number (9948552).

Almost surely, 2^39749663 is an apocalyptic number.

39749663 is a deficient number, since it is larger than the sum of its proper divisors (44545).

39749663 is an equidigital number, since it uses as much as digits as its factorization.

39749663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44544.

The product of its digits is 734832, while the sum is 47.

The square root of 39749663 is about 6304.7333805642. The cubic root of 39749663 is about 341.2802453659.

The spelling of 39749663 in words is "thirty-nine million, seven hundred forty-nine thousand, six hundred sixty-three".