722149 has 2 divisors, whose sum is σ = 722150. Its totient is φ = 722148.

The previous prime is 722147. The next prime is 722153. The reversal of 722149 is 941227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 66049 = 810^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 722149 - 2¹ = 722147 is a prime.

Together with 722147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361074 + 361075.

It is an arithmetic number, because the mean of its divisors is an integer number (361075).

2⁷²²¹⁴⁹ is an apocalyptic number.

It is an amenable number.

722149 is a deficient number, since it is larger than the sum of its proper divisors (1).

722149 is an equidigital number, since it uses as much as digits as its factorization.

722149 is an odious number, because the sum of its binary digits is odd.

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

The square root of 722149 is about 849.7935043291. The cubic root of 722149 is about 89.7171780160.

The spelling of 722149 in words is "seven hundred twenty-two thousand, one hundred forty-nine".