1974671839 has 16 divisors (see below), whose sum is σ = 2411866368. Its totient is φ = 1578114432.

The previous prime is 1974671791. The next prime is 1974671849. The reversal of 1974671839 is 9381764791.

It is a cyclic number.

It is not a de Polignac number, because 1974671839 - 2⁷ = 1974671711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1974671839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974671849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64809 + ... + 90274.

It is an arithmetic number, because the mean of its divisors is an integer number (150741648).

Almost surely, 2^1974671839 is an apocalyptic number.

1974671839 is a deficient number, since it is larger than the sum of its proper divisors (437194529).

1974671839 is a wasteful number, since it uses less digits than its factorization.

1974671839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155214.

The product of its digits is 2286144, while the sum is 55.

The square root of 1974671839 is about 44437.2798334912. The cubic root of 1974671839 is about 1254.5798584108.

The spelling of 1974671839 in words is "one billion, nine hundred seventy-four million, six hundred seventy-one thousand, eight hundred thirty-nine".