401822609 has 2 divisors, whose sum is σ = 401822610. Its totient is φ = 401822608.

The previous prime is 401822567. The next prime is 401822623. The reversal of 401822609 is 906228104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393149584 + 8673025 = 19828^2 + 2945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401822609 is a prime.

It is a super-2 number, since 2×401822609² = 322922818207133762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401822639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200911304 + 200911305.

It is an arithmetic number, because the mean of its divisors is an integer number (200911305).

Almost surely, 2^401822609 is an apocalyptic number.

It is an amenable number.

401822609 is a deficient number, since it is larger than the sum of its proper divisors (1).

401822609 is an equidigital number, since it uses as much as digits as its factorization.

401822609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 401822609 is about 20045.5134381736. The cubic root of 401822609 is about 737.9236957902.

The spelling of 401822609 in words is "four hundred one million, eight hundred twenty-two thousand, six hundred nine".