622278887 has 2 divisors, whose sum is σ = 622278888. Its totient is φ = 622278886.

The previous prime is 622278859. The next prime is 622278893. The reversal of 622278887 is 788872226.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622278887 - 2¹⁰ = 622277863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622278827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311139443 + 311139444.

It is an arithmetic number, because the mean of its divisors is an integer number (311139444).

Almost surely, 2^622278887 is an apocalyptic number.

622278887 is a deficient number, since it is larger than the sum of its proper divisors (1).

622278887 is an equidigital number, since it uses as much as digits as its factorization.

622278887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 50.

The square root of 622278887 is about 24945.5183750509. The cubic root of 622278887 is about 853.7453581576.

The spelling of 622278887 in words is "six hundred twenty-two million, two hundred seventy-eight thousand, eight hundred eighty-seven".