722321377 has 2 divisors, whose sum is σ = 722321378. Its totient is φ = 722321376.

The previous prime is 722321351. The next prime is 722321389. The reversal of 722321377 is 773123227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 716151121 + 6170256 = 26761^2 + 2484^2 .

It is an emirp because it is prime and its reverse (773123227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 722321377 - 2¹¹ = 722319329 is a prime.

It is a super-2 number, since 2×722321377² = 1043496343342352258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (722321777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361160688 + 361160689.

It is an arithmetic number, because the mean of its divisors is an integer number (361160689).

Almost surely, 2^722321377 is an apocalyptic number.

It is an amenable number.

722321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

722321377 is an equidigital number, since it uses as much as digits as its factorization.

722321377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 34.

The square root of 722321377 is about 26876.0372264960. The cubic root of 722321377 is about 897.2431594626.

The spelling of 722321377 in words is "seven hundred twenty-two million, three hundred twenty-one thousand, three hundred seventy-seven".