622649101 has 2 divisors, whose sum is σ = 622649102. Its totient is φ = 622649100.

The previous prime is 622649099. The next prime is 622649117. The reversal of 622649101 is 101946226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477422500 + 145226601 = 21850^2 + 12051^2 .

It is a cyclic number.

It is not a de Polignac number, because 622649101 - 2¹ = 622649099 is a prime.

It is a super-2 number, since 2×622649101² = 775383805952216402, which contains 22 as substring.

Together with 622649099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622649161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311324550 + 311324551.

It is an arithmetic number, because the mean of its divisors is an integer number (311324551).

Almost surely, 2^622649101 is an apocalyptic number.

It is an amenable number.

622649101 is a deficient number, since it is larger than the sum of its proper divisors (1).

622649101 is an equidigital number, since it uses as much as digits as its factorization.

622649101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 622649101 is about 24952.9377228414. The cubic root of 622649101 is about 853.9146315769.

The spelling of 622649101 in words is "six hundred twenty-two million, six hundred forty-nine thousand, one hundred one".