401401069 has 2 divisors, whose sum is σ = 401401070. Its totient is φ = 401401068.

The previous prime is 401401067. The next prime is 401401079. The reversal of 401401069 is 960104104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353928969 + 47472100 = 18813^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 401401069 - 2¹ = 401401067 is a prime.

It is a super-2 number, since 2×401401069² = 322245636388685522, which contains 22 as substring.

Together with 401401067, 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 (401401067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200700534 + 200700535.

It is an arithmetic number, because the mean of its divisors is an integer number (200700535).

Almost surely, 2^401401069 is an apocalyptic number.

It is an amenable number.

401401069 is a deficient number, since it is larger than the sum of its proper divisors (1).

401401069 is an equidigital number, since it uses as much as digits as its factorization.

401401069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 401401069 is about 20034.9961068127. The cubic root of 401401069 is about 737.6655609920.

It can be divided in two parts, 40140 and 1069, that added together give a square (41209 = 203²).

The spelling of 401401069 in words is "four hundred one million, four hundred one thousand, sixty-nine".