1813779922 has 8 divisors (see below), whose sum is σ = 2720851596. Its totient is φ = 906829392.

The previous prime is 1813779907. The next prime is 1813779949. The reversal of 1813779922 is 2299773181.

It can be written as a sum of positive squares in 2 ways, for example, as 1291611721 + 522168201 = 35939^2 + 22851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37408 + ... + 70900.

Almost surely, 2^1813779922 is an apocalyptic number.

1813779922 is a deficient number, since it is larger than the sum of its proper divisors (907071674).

1813779922 is a wasteful number, since it uses less digits than its factorization.

1813779922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60572.

The product of its digits is 381024, while the sum is 49.

The square root of 1813779922 is about 42588.4951835587. The cubic root of 1813779922 is about 1219.5366694411.

The spelling of 1813779922 in words is "one billion, eight hundred thirteen million, seven hundred seventy-nine thousand, nine hundred twenty-two".