7313891 has 4 divisors (see below), whose sum is σ = 7876512. Its totient is φ = 6751272.

The previous prime is 7313881. The next prime is 7313903. The reversal of 7313891 is 1983137.

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

It is a cyclic number.

It is not a de Polignac number, because 7313891 - 2¹⁰ = 7312867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7313881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281291 + ... + 281316.

It is an arithmetic number, because the mean of its divisors is an integer number (1969128).

Almost surely, 2^7313891 is an apocalyptic number.

7313891 is a deficient number, since it is larger than the sum of its proper divisors (562621).

7313891 is a wasteful number, since it uses less digits than its factorization.

7313891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562620.

The product of its digits is 4536, while the sum is 32.

The square root of 7313891 is about 2704.4206403590. The cubic root of 7313891 is about 194.1107084126.

The spelling of 7313891 in words is "seven million, three hundred thirteen thousand, eight hundred ninety-one".