722428477 has 2 divisors, whose sum is σ = 722428478. Its totient is φ = 722428476.

The previous prime is 722428471. The next prime is 722428517. The reversal of 722428477 is 774824227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646634041 + 75794436 = 25429^2 + 8706^2 .

It is a cyclic number.

It is not a de Polignac number, because 722428477 - 2¹¹ = 722426429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722428471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361214238 + 361214239.

It is an arithmetic number, because the mean of its divisors is an integer number (361214239).

Almost surely, 2^722428477 is an apocalyptic number.

It is an amenable number.

722428477 is a deficient number, since it is larger than the sum of its proper divisors (1).

722428477 is an equidigital number, since it uses as much as digits as its factorization.

722428477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 43.

The square root of 722428477 is about 26878.0296338850. The cubic root of 722428477 is about 897.2875026024.

The spelling of 722428477 in words is "seven hundred twenty-two million, four hundred twenty-eight thousand, four hundred seventy-seven".