622987861 has 2 divisors, whose sum is σ = 622987862. Its totient is φ = 622987860.

The previous prime is 622987829. The next prime is 622987877. The reversal of 622987861 is 168789226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585349636 + 37638225 = 24194^2 + 6135^2 .

It is a cyclic number.

It is not a de Polignac number, because 622987861 - 2⁵ = 622987829 is a prime.

It is a super-2 number, since 2×622987861² = 776227749906710642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622987891) 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, 311493930 + 311493931.

It is an arithmetic number, because the mean of its divisors is an integer number (311493931).

Almost surely, 2^622987861 is an apocalyptic number.

It is an amenable number.

622987861 is a deficient number, since it is larger than the sum of its proper divisors (1).

622987861 is an equidigital number, since it uses as much as digits as its factorization.

622987861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 622987861 is about 24959.7247781301. The cubic root of 622987861 is about 854.0694644650.

The spelling of 622987861 in words is "six hundred twenty-two million, nine hundred eighty-seven thousand, eight hundred sixty-one".