7312819 has 2 divisors, whose sum is σ = 7312820. Its totient is φ = 7312818.

The previous prime is 7312759. The next prime is 7312831. The reversal of 7312819 is 9182137.

It is a strong prime.

It is an emirp because it is prime and its reverse (9182137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7312819 - 2¹⁵ = 7280051 is a prime.

It is a super-2 number, since 2×7312819² = 106954643453522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7312859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3656409 + 3656410.

It is an arithmetic number, because the mean of its divisors is an integer number (3656410).

Almost surely, 2^7312819 is an apocalyptic number.

7312819 is a deficient number, since it is larger than the sum of its proper divisors (1).

7312819 is an equidigital number, since it uses as much as digits as its factorization.

7312819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 7312819 is about 2704.2224390756. Note that the first 3 decimals coincide. The cubic root of 7312819 is about 194.1012243205.

The spelling of 7312819 in words is "seven million, three hundred twelve thousand, eight hundred nineteen".