997739963 has 12 divisors (see below), whose sum is σ = 1100803032. Its totient is φ = 896757120.

The previous prime is 997739957. The next prime is 997739969. The reversal of 997739963 is 369937799.

It is an interprime number because it is at equal distance from previous prime (997739957) and next prime (997739969).

It is a de Polignac number, because none of the positive numbers 2^k-997739963 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997739896 and 997739905.

It is not an unprimeable number, because it can be changed into a prime (997739969) 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 11 ways as a sum of consecutive naturals, for example, 1031306 + ... + 1032272.

It is an arithmetic number, because the mean of its divisors is an integer number (91733586).

Almost surely, 2^997739963 is an apocalyptic number.

997739963 is a deficient number, since it is larger than the sum of its proper divisors (103063069).

997739963 is an frugal number, since it uses more digits than its factorization.

997739963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 1075 counting only the distinct ones).

The product of its digits is 17360406, while the sum is 62.

The square root of 997739963 is about 31587.0220660321. The cubic root of 997739963 is about 999.2460860900.

The spelling of 997739963 in words is "nine hundred ninety-seven million, seven hundred thirty-nine thousand, nine hundred sixty-three".