39944993 has 8 divisors (see below), whose sum is σ = 43734816. Its totient is φ = 36181600.

The previous prime is 39944981. The next prime is 39945001.

39944993 is nontrivially palindromic in base 10.

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 39944993 - 2¹² = 39940897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39944393) 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, 3371 + ... + 9552.

It is an arithmetic number, because the mean of its divisors is an integer number (5466852).

Almost surely, 2^39944993 is an apocalyptic number.

It is an amenable number.

39944993 is a deficient number, since it is larger than the sum of its proper divisors (3789823).

39944993 is a wasteful number, since it uses less digits than its factorization.

39944993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13215.

The product of its digits is 944784, while the sum is 50.

The square root of 39944993 is about 6320.2051390758. The cubic root of 39944993 is about 341.8383496745.

The spelling of 39944993 in words is "thirty-nine million, nine hundred forty-four thousand, nine hundred ninety-three".