1817797942 has 8 divisors (see below), whose sum is σ = 2727140832. Its totient is φ = 908751000.

The previous prime is 1817797931. The next prime is 1817797957. The reversal of 1817797942 is 2497977181.

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

It is a congruent number.

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, 57934 + ... + 83617.

It is an arithmetic number, because the mean of its divisors is an integer number (340892604).

Almost surely, 2^1817797942 is an apocalyptic number.

1817797942 is a deficient number, since it is larger than the sum of its proper divisors (909342890).

1817797942 is a wasteful number, since it uses less digits than its factorization.

1817797942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147974.

The product of its digits is 1778112, while the sum is 55.

The square root of 1817797942 is about 42635.6416862700. The cubic root of 1817797942 is about 1220.4365413501.

The spelling of 1817797942 in words is "one billion, eight hundred seventeen million, seven hundred ninety-seven thousand, nine hundred forty-two".