7197760891 has 2 divisors, whose sum is σ = 7197760892. Its totient is φ = 7197760890.

The previous prime is 7197760837. The next prime is 7197760907. The reversal of 7197760891 is 1980677917.

7197760891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1980677917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7197760891 - 2⁹ = 7197760379 is a prime.

It is a super-2 number, since 2×7197760891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7197760811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3598880445 + 3598880446.

It is an arithmetic number, because the mean of its divisors is an integer number (3598880446).

Almost surely, 2^7197760891 is an apocalyptic number.

7197760891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7197760891 is an equidigital number, since it uses as much as digits as its factorization.

7197760891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 55.

The square root of 7197760891 is about 84839.6186401141. The cubic root of 7197760891 is about 1930.7785784603.

The spelling of 7197760891 in words is "seven billion, one hundred ninety-seven million, seven hundred sixty thousand, eight hundred ninety-one".