401189109 has 4 divisors (see below), whose sum is σ = 534918816. Its totient is φ = 267459404.

The previous prime is 401189101. The next prime is 401189119. The reversal of 401189109 is 901981104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401189109 - 2³ = 401189101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401189109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401189101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66864849 + ... + 66864854.

It is an arithmetic number, because the mean of its divisors is an integer number (133729704).

Almost surely, 2^401189109 is an apocalyptic number.

It is an amenable number.

401189109 is a deficient number, since it is larger than the sum of its proper divisors (133729707).

401189109 is a wasteful number, since it uses less digits than its factorization.

401189109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133729706.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 401189109 is about 20029.7056643377. The cubic root of 401189109 is about 737.5356965964.

The spelling of 401189109 in words is "four hundred one million, one hundred eighty-nine thousand, one hundred nine".