39943512973 has 16 divisors (see below), whose sum is σ = 49336229376. Its totient is φ = 31491169920.

The previous prime is 39943512967. The next prime is 39943512979. The reversal of 39943512973 is 37921534993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39943512967) and next prime (39943512979).

It is not a de Polignac number, because 39943512973 - 2⁵ = 39943512941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39943512979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755461 + ... + 806602.

It is an arithmetic number, because the mean of its divisors is an integer number (3083514336).

Almost surely, 2^39943512973 is an apocalyptic number.

It is an amenable number.

39943512973 is a deficient number, since it is larger than the sum of its proper divisors (9392716403).

39943512973 is a wasteful number, since it uses less digits than its factorization.

39943512973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562364.

The product of its digits is 5511240, while the sum is 55.

The spelling of 39943512973 in words is "thirty-nine billion, nine hundred forty-three million, five hundred twelve thousand, nine hundred seventy-three".