7987963 has 4 divisors (see below), whose sum is σ = 8263440. Its totient is φ = 7712488.

The previous prime is 7987957. The next prime is 7988009. The reversal of 7987963 is 3697897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7987963 - 2¹³ = 7979771 is a prime.

It is an Ulam number.

It is a Duffinian number.

7987963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7987363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137695 + ... + 137752.

It is an arithmetic number, because the mean of its divisors is an integer number (2065860).

Almost surely, 2^7987963 is an apocalyptic number.

7987963 is a deficient number, since it is larger than the sum of its proper divisors (275477).

7987963 is a wasteful number, since it uses less digits than its factorization.

7987963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275476.

The product of its digits is 571536, while the sum is 49.

The square root of 7987963 is about 2826.2984626539. The cubic root of 7987963 is about 199.8996413158.

The spelling of 7987963 in words is "seven million, nine hundred eighty-seven thousand, nine hundred sixty-three".