997706983 has 48 divisors (see below), whose sum is σ = 1286925024. Its totient is φ = 766402560.

The previous prime is 997706953. The next prime is 997706989. The reversal of 997706983 is 389607799.

It is a de Polignac number, because none of the positive numbers 2^k-997706983 is a prime.

It is the 31587-th Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997706989) by changing a digit.

It is a nontrivial repunit in base 31586.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4139743 + ... + 4139983.

It is an arithmetic number, because the mean of its divisors is an integer number (26810938).

Almost surely, 2^997706983 is an apocalyptic number.

997706983 is a deficient number, since it is larger than the sum of its proper divisors (289218041).

997706983 is a wasteful number, since it uses less digits than its factorization.

997706983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 997706983 is about 31586.5000118722. The cubic root of 997706983 is about 999.2350760405.

The spelling of 997706983 in words is "nine hundred ninety-seven million, seven hundred six thousand, nine hundred eighty-three".