7997001982 has 4 divisors (see below), whose sum is σ = 11995502976. Its totient is φ = 3998500990.

The previous prime is 7997001917. The next prime is 7997002033. The reversal of 7997001982 is 2891007997.

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

It is a super-2 number, since 2×7997001982² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999250494 + ... + 1999250497.

It is an arithmetic number, because the mean of its divisors is an integer number (2998875744).

Almost surely, 2^7997001982 is an apocalyptic number.

7997001982 is a deficient number, since it is larger than the sum of its proper divisors (3998500994).

7997001982 is a wasteful number, since it uses less digits than its factorization.

7997001982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998500993.

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 7997001982 is about 89425.9580994244. The cubic root of 7997001982 is about 1999.7501339514.

The spelling of 7997001982 in words is "seven billion, nine hundred ninety-seven million, one thousand, nine hundred eighty-two".