974243839 has 4 divisors (see below), whose sum is σ = 974448720. Its totient is φ = 974038960.

The previous prime is 974243833. The next prime is 974243857. The reversal of 974243839 is 938342479.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938342479 = 347 ⋅2704157.

It is a cyclic number.

It is not a de Polignac number, because 974243839 - 2¹¹ = 974241791 is a prime.

It is a Duffinian number.

974243839 is a modest number, since divided by 43839 gives 9742 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 974243792 and 974243801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974243833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95134 + ... + 104875.

It is an arithmetic number, because the mean of its divisors is an integer number (243612180).

Almost surely, 2^974243839 is an apocalyptic number.

974243839 is a deficient number, since it is larger than the sum of its proper divisors (204881).

974243839 is a wasteful number, since it uses less digits than its factorization.

974243839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204880.

The product of its digits is 1306368, while the sum is 49.

The square root of 974243839 is about 31212.8793769495. The cubic root of 974243839 is about 991.3398309724.

The spelling of 974243839 in words is "nine hundred seventy-four million, two hundred forty-three thousand, eight hundred thirty-nine".