3971244739 has 64 divisors (see below), whose sum is σ = 5492736000. Its totient is φ = 2835453600.

The previous prime is 3971244737. The next prime is 3971244751. The reversal of 3971244739 is 9374421793.

3971244739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3971244739 - 2¹ = 3971244737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3971244692 and 3971244701.

It is not an unprimeable number, because it can be changed into a prime (3971244737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2221404 + ... + 2223190.

It is an arithmetic number, because the mean of its divisors is an integer number (85824000).

Almost surely, 2^3971244739 is an apocalyptic number.

3971244739 is a deficient number, since it is larger than the sum of its proper divisors (1521491261).

3971244739 is a wasteful number, since it uses less digits than its factorization.

3971244739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869 (or 1855 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 49.

The square root of 3971244739 is about 63017.8128706479. The cubic root of 3971244739 is about 1583.5880560479.

The spelling of 3971244739 in words is "three billion, nine hundred seventy-one million, two hundred forty-four thousand, seven hundred thirty-nine".