622278893 has 2 divisors, whose sum is σ = 622278894. Its totient is φ = 622278892.

The previous prime is 622278887. The next prime is 622278941. The reversal of 622278893 is 398872226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565155529 + 57123364 = 23773^2 + 7558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622278893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622278793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311139446 + 311139447.

It is an arithmetic number, because the mean of its divisors is an integer number (311139447).

Almost surely, 2^622278893 is an apocalyptic number.

It is an amenable number.

622278893 is a deficient number, since it is larger than the sum of its proper divisors (1).

622278893 is an equidigital number, since it uses as much as digits as its factorization.

622278893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 622278893 is about 24945.5184953129. The cubic root of 622278893 is about 853.7453609015.

The spelling of 622278893 in words is "six hundred twenty-two million, two hundred seventy-eight thousand, eight hundred ninety-three".