7219427 has 2 divisors, whose sum is σ = 7219428. Its totient is φ = 7219426.

The previous prime is 7219391. The next prime is 7219469. The reversal of 7219427 is 7249127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7219427 - 2¹⁰ = 7218403 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7219393 and 7219402.

It is not a weakly prime, because it can be changed into another prime (7219327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3609713 + 3609714.

It is an arithmetic number, because the mean of its divisors is an integer number (3609714).

Almost surely, 2^7219427 is an apocalyptic number.

7219427 is a deficient number, since it is larger than the sum of its proper divisors (1).

7219427 is an equidigital number, since it uses as much as digits as its factorization.

7219427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 7219427 is about 2686.8991421339. The cubic root of 7219427 is about 193.2713928276.

The spelling of 7219427 in words is "seven million, two hundred nineteen thousand, four hundred twenty-seven".