400423133 has 4 divisors (see below), whose sum is σ = 436825248. Its totient is φ = 364021020.

The previous prime is 400423103. The next prime is 400423171. The reversal of 400423133 is 331324004.

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 not a de Polignac number, because 400423133 - 2⁶ = 400423069 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 (400423103) 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, 18201041 + ... + 18201062.

It is an arithmetic number, because the mean of its divisors is an integer number (109206312).

Almost surely, 2^400423133 is an apocalyptic number.

It is an amenable number.

400423133 is a deficient number, since it is larger than the sum of its proper divisors (36402115).

400423133 is a wasteful number, since it uses less digits than its factorization.

400423133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36402114.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 400423133 is about 20010.5755289547. The cubic root of 400423133 is about 737.0660140549.

Adding to 400423133 its reverse (331324004), we get a palindrome (731747137).

The spelling of 400423133 in words is "four hundred million, four hundred twenty-three thousand, one hundred thirty-three".