431109121 has 4 divisors (see below), whose sum is σ = 431527492. Its totient is φ = 430690752.

The previous prime is 431109113. The next prime is 431109127. The reversal of 431109121 is 121901134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 418407025 + 12702096 = 20455^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 431109121 - 2³ = 431109113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431109092 and 431109101.

It is not an unprimeable number, because it can be changed into a prime (431109127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207636 + ... + 209701.

It is an arithmetic number, because the mean of its divisors is an integer number (107881873).

Almost surely, 2^431109121 is an apocalyptic number.

It is an amenable number.

431109121 is a deficient number, since it is larger than the sum of its proper divisors (418371).

431109121 is a wasteful number, since it uses less digits than its factorization.

431109121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418370.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 431109121 is about 20763.1674125120. The cubic root of 431109121 is about 755.4326254642.

The spelling of 431109121 in words is "four hundred thirty-one million, one hundred nine thousand, one hundred twenty-one".