622188401 has 2 divisors, whose sum is σ = 622188402. Its totient is φ = 622188400.

The previous prime is 622188373. The next prime is 622188419. The reversal of 622188401 is 104881226.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458987776 + 163200625 = 21424^2 + 12775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622188401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_32421497 and since 622188401 and 32421497 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (622188451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311094200 + 311094201.

It is an arithmetic number, because the mean of its divisors is an integer number (311094201).

Almost surely, 2^622188401 is an apocalyptic number.

It is an amenable number.

622188401 is a deficient number, since it is larger than the sum of its proper divisors (1).

622188401 is an equidigital number, since it uses as much as digits as its factorization.

622188401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 622188401 is about 24943.7046366413. The cubic root of 622188401 is about 853.7039749188.

The spelling of 622188401 in words is "six hundred twenty-two million, one hundred eighty-eight thousand, four hundred one".