406099091 has 4 divisors (see below), whose sum is σ = 413761392. Its totient is φ = 398436792.

The previous prime is 406099069. The next prime is 406099097. The reversal of 406099091 is 190990604.

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 406099091 - 2¹⁸ = 405836947 is a prime.

It is a super-2 number, since 2×406099091² = 329832943422052562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406099097) 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, 3831071 + ... + 3831176.

It is an arithmetic number, because the mean of its divisors is an integer number (103440348).

Almost surely, 2^406099091 is an apocalyptic number.

406099091 is a deficient number, since it is larger than the sum of its proper divisors (7662301).

406099091 is an equidigital number, since it uses as much as digits as its factorization.

406099091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662300.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 406099091 is about 20151.9004314730. The cubic root of 406099091 is about 740.5322996274.

The spelling of 406099091 in words is "four hundred six million, ninety-nine thousand, ninety-one".