39973603493 has 4 divisors (see below), whose sum is σ = 39987928608. Its totient is φ = 39959278380.

The previous prime is 39973603489. The next prime is 39973603561. The reversal of 39973603493 is 39430637993.

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.

It is a cyclic number.

It is not a de Polignac number, because 39973603493 - 2² = 39973603489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39973603403) 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 3 ways as a sum of consecutive naturals, for example, 7158371 + ... + 7163952.

It is an arithmetic number, because the mean of its divisors is an integer number (9996982152).

Almost surely, 2^39973603493 is an apocalyptic number.

It is an amenable number.

39973603493 is a deficient number, since it is larger than the sum of its proper divisors (14325115).

39973603493 is a wasteful number, since it uses less digits than its factorization.

39973603493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14325114.

The product of its (nonzero) digits is 9920232, while the sum is 56.

The spelling of 39973603493 in words is "thirty-nine billion, nine hundred seventy-three million, six hundred three thousand, four hundred ninety-three".