401841109 has 2 divisors, whose sum is σ = 401841110. Its totient is φ = 401841108.

The previous prime is 401841107. The next prime is 401841131. The reversal of 401841109 is 901148104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399600100 + 2241009 = 19990^2 + 1497^2 .

It is a cyclic number.

It is not a de Polignac number, because 401841109 - 2¹ = 401841107 is a prime.

It is a super-2 number, since 2×401841109² = 322952553764699762, which contains 22 as substring.

Together with 401841107, 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 (401841101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200920554 + 200920555.

It is an arithmetic number, because the mean of its divisors is an integer number (200920555).

Almost surely, 2^401841109 is an apocalyptic number.

It is an amenable number.

401841109 is a deficient number, since it is larger than the sum of its proper divisors (1).

401841109 is an equidigital number, since it uses as much as digits as its factorization.

401841109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 401841109 is about 20045.9748827539. The cubic root of 401841109 is about 737.9350203387.

The spelling of 401841109 in words is "four hundred one million, eight hundred forty-one thousand, one hundred nine".