7319891 has 2 divisors, whose sum is σ = 7319892. Its totient is φ = 7319890.

The previous prime is 7319881. The next prime is 7319909. The reversal of 7319891 is 1989137.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7319891 - 2¹⁰ = 7318867 is a prime.

It is a Sophie Germain prime.

It is equal to p₄₉₆₉₁₉ and since 7319891 and 496919 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (7319881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3659945 + 3659946.

It is an arithmetic number, because the mean of its divisors is an integer number (3659946).

Almost surely, 2^7319891 is an apocalyptic number.

7319891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7319891 is an equidigital number, since it uses as much as digits as its factorization.

7319891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 7319891 is about 2705.5297078391. The cubic root of 7319891 is about 194.1637739156.

The spelling of 7319891 in words is "seven million, three hundred nineteen thousand, eight hundred ninety-one".