7974838143 has 12 divisors (see below), whose sum is σ = 11522074200. Its totient is φ = 5315237136.

The previous prime is 7974838141. The next prime is 7974838153. The reversal of 7974838143 is 3418384797.

It is not a de Polignac number, because 7974838143 - 2¹ = 7974838141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7974838143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7974838141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71196 + ... + 144977.

It is an arithmetic number, because the mean of its divisors is an integer number (960172850).

Almost surely, 2^7974838143 is an apocalyptic number.

7974838143 is a deficient number, since it is larger than the sum of its proper divisors (3547236057).

7974838143 is a wasteful number, since it uses less digits than its factorization.

7974838143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220278 (or 220275 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 7974838143 is about 89301.9492676392. The cubic root of 7974838143 is about 1997.9009764040.

The spelling of 7974838143 in words is "seven billion, nine hundred seventy-four million, eight hundred thirty-eight thousand, one hundred forty-three".