1912080639 has 16 divisors (see below), whose sum is σ = 2957136128. Its totient is φ = 1076308992.

The previous prime is 1912080607. The next prime is 1912080647. The reversal of 1912080639 is 9360802191.

It is not a de Polignac number, because 1912080639 - 2⁵ = 1912080607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1912080597 and 1912080606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912080659) 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, 678082 + ... + 680895.

It is an arithmetic number, because the mean of its divisors is an integer number (184821008).

Almost surely, 2^1912080639 is an apocalyptic number.

1912080639 is a deficient number, since it is larger than the sum of its proper divisors (1045055489).

1912080639 is a wasteful number, since it uses less digits than its factorization.

1912080639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359054.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1912080639 is about 43727.3442939312. The cubic root of 1912080639 is about 1241.1818075227.

The spelling of 1912080639 in words is "one billion, nine hundred twelve million, eighty thousand, six hundred thirty-nine".