7321913 has 2 divisors, whose sum is σ = 7321914. Its totient is φ = 7321912.

The previous prime is 7321877. The next prime is 7321927. The reversal of 7321913 is 3191237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7139584 + 182329 = 2672^2 + 427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7321913 is a prime.

It is a super-2 number, since 2×7321913² = 107220819959138, which contains 22 as substring.

It is a Chen prime.

It is equal to p₄₉₇₀₅₁ and since 7321913 and 497051 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 (7321943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3660956 + 3660957.

It is an arithmetic number, because the mean of its divisors is an integer number (3660957).

Almost surely, 2^7321913 is an apocalyptic number.

It is an amenable number.

7321913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7321913 is an equidigital number, since it uses as much as digits as its factorization.

7321913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 26.

The square root of 7321913 is about 2705.9033611716. The cubic root of 7321913 is about 194.1816504572.

The spelling of 7321913 in words is "seven million, three hundred twenty-one thousand, nine hundred thirteen".