3974248643 has 4 divisors (see below), whose sum is σ = 4030224048. Its totient is φ = 3918273240.

The previous prime is 3974248583. The next prime is 3974248651. The reversal of 3974248643 is 3468424793.

3974248643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3468424793 = 733 ⋅4731821.

It is a cyclic number.

It is not a de Polignac number, because 3974248643 - 2⁸ = 3974248387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3974248591 and 3974248600.

It is not an unprimeable number, because it can be changed into a prime (3974248843) 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, 27987596 + ... + 27987737.

It is an arithmetic number, because the mean of its divisors is an integer number (1007556012).

Almost surely, 2^3974248643 is an apocalyptic number.

3974248643 is a deficient number, since it is larger than the sum of its proper divisors (55975405).

3974248643 is an equidigital number, since it uses as much as digits as its factorization.

3974248643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55975404.

The product of its digits is 3483648, while the sum is 50.

The square root of 3974248643 is about 63041.6421343861. The cubic root of 3974248643 is about 1583.9872379926.

The spelling of 3974248643 in words is "three billion, nine hundred seventy-four million, two hundred forty-eight thousand, six hundred forty-three".