3973986013 has 4 divisors (see below), whose sum is σ = 3975976000. Its totient is φ = 3971996028.

The previous prime is 3973985969. The next prime is 3973986017. The reversal of 3973986013 is 3106893793.

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 a de Polignac number, because none of the positive numbers 2^k-3973986013 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 (3973986017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991995 + ... + 995992.

It is an arithmetic number, because the mean of its divisors is an integer number (993994000).

Almost surely, 2^3973986013 is an apocalyptic number.

It is an amenable number.

3973986013 is a deficient number, since it is larger than the sum of its proper divisors (1989987).

3973986013 is a wasteful number, since it uses less digits than its factorization.

3973986013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989986.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 3973986013 is about 63039.5591117197. The cubic root of 3973986013 is about 1583.9523457174.

The spelling of 3973986013 in words is "three billion, nine hundred seventy-three million, nine hundred eighty-six thousand, thirteen".