622036813 has 2 divisors, whose sum is σ = 622036814. Its totient is φ = 622036812.

The previous prime is 622036739. The next prime is 622036843. The reversal of 622036813 is 318630226.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498093124 + 123943689 = 22318^2 + 11133^2 .

It is a cyclic number.

It is not a de Polignac number, because 622036813 - 2⁹ = 622036301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622036843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311018406 + 311018407.

It is an arithmetic number, because the mean of its divisors is an integer number (311018407).

Almost surely, 2^622036813 is an apocalyptic number.

It is an amenable number.

622036813 is a deficient number, since it is larger than the sum of its proper divisors (1).

622036813 is an equidigital number, since it uses as much as digits as its factorization.

622036813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 622036813 is about 24940.6658491709. The cubic root of 622036813 is about 853.6346380485.

The spelling of 622036813 in words is "six hundred twenty-two million, thirty-six thousand, eight hundred thirteen".