722311493 has 2 divisors, whose sum is σ = 722311494. Its totient is φ = 722311492.

The previous prime is 722311477. The next prime is 722311519. The reversal of 722311493 is 394113227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 704477764 + 17833729 = 26542^2 + 4223^2 .

It is a cyclic number.

It is not a de Polignac number, because 722311493 - 2⁴ = 722311477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722311433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361155746 + 361155747.

It is an arithmetic number, because the mean of its divisors is an integer number (361155747).

Almost surely, 2^722311493 is an apocalyptic number.

It is an amenable number.

722311493 is a deficient number, since it is larger than the sum of its proper divisors (1).

722311493 is an equidigital number, since it uses as much as digits as its factorization.

722311493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 32.

The square root of 722311493 is about 26875.8533445917. The cubic root of 722311493 is about 897.2390669206.

The spelling of 722311493 in words is "seven hundred twenty-two million, three hundred eleven thousand, four hundred ninety-three".