622037681 has 2 divisors, whose sum is σ = 622037682. Its totient is φ = 622037680.

The previous prime is 622037657. The next prime is 622037711. The reversal of 622037681 is 186730226.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538936225 + 83101456 = 23215^2 + 9116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622037681 is a prime.

It is a super-2 number, since 2×622037681² = 773861753167715522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (622037641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311018840 + 311018841.

It is an arithmetic number, because the mean of its divisors is an integer number (311018841).

Almost surely, 2^622037681 is an apocalyptic number.

It is an amenable number.

622037681 is a deficient number, since it is larger than the sum of its proper divisors (1).

622037681 is an equidigital number, since it uses as much as digits as its factorization.

622037681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 622037681 is about 24940.6832504645. The cubic root of 622037681 is about 853.6350351068.

The spelling of 622037681 in words is "six hundred twenty-two million, thirty-seven thousand, six hundred eighty-one".