1997383718 has 8 divisors (see below), whose sum is σ = 3268446120. Its totient is φ = 907901680.

The previous prime is 1997383651. The next prime is 1997383741. The reversal of 1997383718 is 8173837991.

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

It is a Curzon number.

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, 45395063 + ... + 45395106.

It is an arithmetic number, because the mean of its divisors is an integer number (408555765).

Almost surely, 2^1997383718 is an apocalyptic number.

1997383718 is a deficient number, since it is larger than the sum of its proper divisors (1271062402).

1997383718 is a wasteful number, since it uses less digits than its factorization.

1997383718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90790182.

The product of its digits is 2286144, while the sum is 56.

The square root of 1997383718 is about 44692.0990556496. The cubic root of 1997383718 is about 1259.3714253690.

The spelling of 1997383718 in words is "one billion, nine hundred ninety-seven million, three hundred eighty-three thousand, seven hundred eighteen".