406094191 has 4 divisors (see below), whose sum is σ = 407480472. Its totient is φ = 404707912.

The previous prime is 406094177. The next prime is 406094197. The reversal of 406094191 is 191490604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406094191 - 2¹⁷ = 405963119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406094197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692701 + ... + 693286.

It is an arithmetic number, because the mean of its divisors is an integer number (101870118).

Almost surely, 2^406094191 is an apocalyptic number.

406094191 is a deficient number, since it is larger than the sum of its proper divisors (1386281).

406094191 is a wasteful number, since it uses less digits than its factorization.

406094191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386280.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 406094191 is about 20151.7788544833. The cubic root of 406094191 is about 740.5293211895.

The spelling of 406094191 in words is "four hundred six million, ninety-four thousand, one hundred ninety-one".