974723839 has 4 divisors (see below), whose sum is σ = 989272024. Its totient is φ = 960175656.

The previous prime is 974723833. The next prime is 974723851. The reversal of 974723839 is 938327479.

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: 938327479 = 113 ⋅8303783.

It is a cyclic number.

It is not a de Polignac number, because 974723839 - 2¹³ = 974715647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974723833) 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, 7273992 + ... + 7274125.

It is an arithmetic number, because the mean of its divisors is an integer number (247318006).

Almost surely, 2^974723839 is an apocalyptic number.

974723839 is a deficient number, since it is larger than the sum of its proper divisors (14548185).

974723839 is a wasteful number, since it uses less digits than its factorization.

974723839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14548184.

The product of its digits is 2286144, while the sum is 52.

The square root of 974723839 is about 31220.5675637071. The cubic root of 974723839 is about 991.5026119154.

The spelling of 974723839 in words is "nine hundred seventy-four million, seven hundred twenty-three thousand, eight hundred thirty-nine".