401107409 has 2 divisors, whose sum is σ = 401107410. Its totient is φ = 401107408.

The previous prime is 401107393. The next prime is 401107433. The reversal of 401107409 is 904701104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388878400 + 12229009 = 19720^2 + 3497^2 .

It is a cyclic number.

It is not a de Polignac number, because 401107409 - 2⁴ = 401107393 is a prime.

It is not a weakly prime, because it can be changed into another prime (401107489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200553704 + 200553705.

It is an arithmetic number, because the mean of its divisors is an integer number (200553705).

Almost surely, 2^401107409 is an apocalyptic number.

It is an amenable number.

401107409 is a deficient number, since it is larger than the sum of its proper divisors (1).

401107409 is an equidigital number, since it uses as much as digits as its factorization.

401107409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 401107409 is about 20027.6660896870. Note that the first 3 decimals coincide. The cubic root of 401107409 is about 737.4856281409.

The spelling of 401107409 in words is "four hundred one million, one hundred seven thousand, four hundred nine".