7974143647 has 4 divisors (see below), whose sum is σ = 7977478320. Its totient is φ = 7970808976.

The previous prime is 7974143599. The next prime is 7974143663. The reversal of 7974143647 is 7463414797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7463414797 = 577 ⋅12934861.

It is a cyclic number.

It is not a de Polignac number, because 7974143647 - 2⁷ = 7974143519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7974143594 and 7974143603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7974149647) 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, 1663747 + ... + 1668532.

It is an arithmetic number, because the mean of its divisors is an integer number (1994369580).

Almost surely, 2^7974143647 is an apocalyptic number.

7974143647 is a deficient number, since it is larger than the sum of its proper divisors (3334673).

7974143647 is a wasteful number, since it uses less digits than its factorization.

7974143647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334672.

The product of its digits is 3556224, while the sum is 52.

The square root of 7974143647 is about 89298.0607124253. The cubic root of 7974143647 is about 1997.8429783819.

The spelling of 7974143647 in words is "seven billion, nine hundred seventy-four million, one hundred forty-three thousand, six hundred forty-seven".