401870669 has 2 divisors, whose sum is σ = 401870670. Its totient is φ = 401870668.

The previous prime is 401870641. The next prime is 401870681. The reversal of 401870669 is 966078104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401802025 + 68644 = 20045^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 401870669 - 2¹² = 401866573 is a prime.

It is a super-2 number, since 2×401870669² = 323000069205015122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401870629) 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, 200935334 + 200935335.

It is an arithmetic number, because the mean of its divisors is an integer number (200935335).

Almost surely, 2^401870669 is an apocalyptic number.

It is an amenable number.

401870669 is a deficient number, since it is larger than the sum of its proper divisors (1).

401870669 is an equidigital number, since it uses as much as digits as its factorization.

401870669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 401870669 is about 20046.7121743193. The cubic root of 401870669 is about 737.9531144094.

The spelling of 401870669 in words is "four hundred one million, eight hundred seventy thousand, six hundred sixty-nine".