401819409 has 12 divisors (see below), whose sum is σ = 581654736. Its totient is φ = 267303192.

The previous prime is 401819401. The next prime is 401819413. The reversal of 401819409 is 904918104.

It is not a de Polignac number, because 401819409 - 2³ = 401819401 is a prime.

It is a super-2 number, since 2×401819409² = 322917674898218562, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401819401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43599 + ... + 52004.

It is an arithmetic number, because the mean of its divisors is an integer number (48471228).

Almost surely, 2^401819409 is an apocalyptic number.

It is an amenable number.

401819409 is a deficient number, since it is larger than the sum of its proper divisors (179835327).

401819409 is a wasteful number, since it uses less digits than its factorization.

401819409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96076 (or 96073 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 401819409 is about 20045.4336196551. The cubic root of 401819409 is about 737.9217369141.

The spelling of 401819409 in words is "four hundred one million, eight hundred nineteen thousand, four hundred nine".