7219391 has 2 divisors, whose sum is σ = 7219392. Its totient is φ = 7219390.

The previous prime is 7219361. The next prime is 7219427. The reversal of 7219391 is 1939127.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7219391 - 2⁶ = 7219327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7219361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3609695 + 3609696.

It is an arithmetic number, because the mean of its divisors is an integer number (3609696).

Almost surely, 2^7219391 is an apocalyptic number.

7219391 is a deficient number, since it is larger than the sum of its proper divisors (1).

7219391 is an equidigital number, since it uses as much as digits as its factorization.

7219391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 32.

The square root of 7219391 is about 2686.8924429534. The cubic root of 7219391 is about 193.2710715749.

The spelling of 7219391 in words is "seven million, two hundred nineteen thousand, three hundred ninety-one".