406401193 has 4 divisors (see below), whose sum is σ = 443346768. Its totient is φ = 369455620.

The previous prime is 406401187. The next prime is 406401197. The reversal of 406401193 is 391104604.

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 406401193 - 2⁵ = 406401161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406401197) 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, 18472771 + ... + 18472792.

It is an arithmetic number, because the mean of its divisors is an integer number (110836692).

Almost surely, 2^406401193 is an apocalyptic number.

It is an amenable number.

406401193 is a deficient number, since it is larger than the sum of its proper divisors (36945575).

406401193 is a wasteful number, since it uses less digits than its factorization.

406401193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36945574.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 406401193 is about 20159.3946585705. The cubic root of 406401193 is about 740.7158844073.

Adding to 406401193 its reverse (391104604), we get a palindrome (797505797).

The spelling of 406401193 in words is "four hundred six million, four hundred one thousand, one hundred ninety-three".