7091199971 has 2 divisors, whose sum is σ = 7091199972. Its totient is φ = 7091199970.

The previous prime is 7091199967. The next prime is 7091200009. The reversal of 7091199971 is 1799911907.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7091199971 - 2² = 7091199967 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (7091199901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3545599985 + 3545599986.

It is an arithmetic number, because the mean of its divisors is an integer number (3545599986).

Almost surely, 2^7091199971 is an apocalyptic number.

7091199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

7091199971 is an equidigital number, since it uses as much as digits as its factorization.

7091199971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 53.

The square root of 7091199971 is about 84209.2629762308. The cubic root of 7091199971 is about 1921.2029472355.

The spelling of 7091199971 in words is "seven billion, ninety-one million, one hundred ninety-nine thousand, nine hundred seventy-one".