1997682943 has 8 divisors (see below), whose sum is σ = 2046041856. Its totient is φ = 1949719200.

The previous prime is 1997682931. The next prime is 1997682979. The reversal of 1997682943 is 3492867991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997682943 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 (1997682983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88548 + ... + 108793.

It is an arithmetic number, because the mean of its divisors is an integer number (255755232).

Almost surely, 2^1997682943 is an apocalyptic number.

1997682943 is a deficient number, since it is larger than the sum of its proper divisors (48358913).

1997682943 is a wasteful number, since it uses less digits than its factorization.

1997682943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197585.

The product of its digits is 5878656, while the sum is 58.

The square root of 1997682943 is about 44695.4465577871. The cubic root of 1997682943 is about 1259.4343103979.

The spelling of 1997682943 in words is "one billion, nine hundred ninety-seven million, six hundred eighty-two thousand, nine hundred forty-three".