7992489971 has 2 divisors, whose sum is σ = 7992489972. Its totient is φ = 7992489970.

The previous prime is 7992489913. The next prime is 7992489977. The reversal of 7992489971 is 1799842997.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7992489971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7992489898 and 7992489907.

It is not a weakly prime, because it can be changed into another prime (7992489977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3996244985 + 3996244986.

It is an arithmetic number, because the mean of its divisors is an integer number (3996244986).

Almost surely, 2^7992489971 is an apocalyptic number.

7992489971 is a deficient number, since it is larger than the sum of its proper divisors (1).

7992489971 is an equidigital number, since it uses as much as digits as its factorization.

7992489971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 65.

The square root of 7992489971 is about 89400.7269042036. The cubic root of 7992489971 is about 1999.3739683126.

The spelling of 7992489971 in words is "seven billion, nine hundred ninety-two million, four hundred eighty-nine thousand, nine hundred seventy-one".