622143647 has 2 divisors, whose sum is σ = 622143648. Its totient is φ = 622143646.

The previous prime is 622143631. The next prime is 622143659. The reversal of 622143647 is 746341226.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 622143647 - 2⁴ = 622143631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622143607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311071823 + 311071824.

It is an arithmetic number, because the mean of its divisors is an integer number (311071824).

Almost surely, 2^622143647 is an apocalyptic number.

622143647 is a deficient number, since it is larger than the sum of its proper divisors (1).

622143647 is an equidigital number, since it uses as much as digits as its factorization.

622143647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 622143647 is about 24942.8075204056. The cubic root of 622143647 is about 853.6835054577.

The spelling of 622143647 in words is "six hundred twenty-two million, one hundred forty-three thousand, six hundred forty-seven".