722239877 has 2 divisors, whose sum is σ = 722239878. Its totient is φ = 722239876.

The previous prime is 722239871. The next prime is 722239879. The reversal of 722239877 is 778932227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636603361 + 85636516 = 25231^2 + 9254^2 .

It is a cyclic number.

It is not a de Polignac number, because 722239877 - 2¹² = 722235781 is a prime.

Together with 722239879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722239871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361119938 + 361119939.

It is an arithmetic number, because the mean of its divisors is an integer number (361119939).

Almost surely, 2^722239877 is an apocalyptic number.

It is an amenable number.

722239877 is a deficient number, since it is larger than the sum of its proper divisors (1).

722239877 is an equidigital number, since it uses as much as digits as its factorization.

722239877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 47.

The square root of 722239877 is about 26874.5209631725. The cubic root of 722239877 is about 897.2094126798.

The spelling of 722239877 in words is "seven hundred twenty-two million, two hundred thirty-nine thousand, eight hundred seventy-seven".