1974645279 has 6 divisors (see below), whose sum is σ = 2852265416. Its totient is φ = 1316430180.

The previous prime is 1974645229. The next prime is 1974645311. The reversal of 1974645279 is 9725464791.

It is not a de Polignac number, because 1974645279 - 2⁹ = 1974644767 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 (1974645229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109702507 + ... + 109702524.

Almost surely, 2^1974645279 is an apocalyptic number.

1974645279 is a deficient number, since it is larger than the sum of its proper divisors (877620137).

1974645279 is a wasteful number, since it uses less digits than its factorization.

1974645279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219405037 (or 219405034 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 1974645279 is about 44436.9809843108. The cubic root of 1974645279 is about 1254.5742335453.

It can be divided in two parts, 19746 and 45279, that added together give a square (65025 = 255²).

The spelling of 1974645279 in words is "one billion, nine hundred seventy-four million, six hundred forty-five thousand, two hundred seventy-nine".