7220149 has 2 divisors, whose sum is σ = 7220150. Its totient is φ = 7220148.

The previous prime is 7220131. The next prime is 7220153. The reversal of 7220149 is 9410227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 381924 = 2615^2 + 618^2 .

It is an emirp because it is prime and its reverse (9410227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7220249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610074 + 3610075.

It is an arithmetic number, because the mean of its divisors is an integer number (3610075).

Almost surely, 2^7220149 is an apocalyptic number.

It is an amenable number.

7220149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220149 is an equidigital number, since it uses as much as digits as its factorization.

7220149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 7220149 is about 2687.0334943949. The cubic root of 7220149 is about 193.2778355039.

The spelling of 7220149 in words is "seven million, two hundred twenty thousand, one hundred forty-nine".