7997943 has 16 divisors (see below), whose sum is σ = 10999296. Its totient is φ = 5166720.

The previous prime is 7997933. The next prime is 7997947. The reversal of 7997943 is 3497997.

7997943 = 27² + 28² + ... + 288².

It is a de Polignac number, because none of the positive numbers 2^k-7997943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7997892 and 7997901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18255 + ... + 18687.

It is an arithmetic number, because the mean of its divisors is an integer number (687456).

Almost surely, 2^7997943 is an apocalyptic number.

7997943 is a deficient number, since it is larger than the sum of its proper divisors (3001353).

7997943 is a wasteful number, since it uses less digits than its factorization.

7997943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its digits is 428652, while the sum is 48.

The square root of 7997943 is about 2828.0634717064. The cubic root of 7997943 is about 199.9828568639.

The spelling of 7997943 in words is "seven million, nine hundred ninety-seven thousand, nine hundred forty-three".