7220407 has 2 divisors, whose sum is σ = 7220408. Its totient is φ = 7220406.

The previous prime is 7220383. The next prime is 7220417. The reversal of 7220407 is 7040227.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7220417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610203 + 3610204.

It is an arithmetic number, because the mean of its divisors is an integer number (3610204).

Almost surely, 2^7220407 is an apocalyptic number.

7220407 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220407 is an equidigital number, since it uses as much as digits as its factorization.

7220407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 7220407 is about 2687.0815022995. The cubic root of 7220407 is about 193.2801376304.

The spelling of 7220407 in words is "seven million, two hundred twenty thousand, four hundred seven".