431001001 has 4 divisors (see below), whose sum is σ = 433382404. Its totient is φ = 428619600.

The previous prime is 431000993. The next prime is 431001013. The reversal of 431001001 is 100100134.

It is a happy number.

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 98485776 + 332515225 = 9924^2 + 18235^2 .

It is a cyclic number.

It is not a de Polignac number, because 431001001 - 2³ = 431000993 is a prime.

It is a Duffinian number.

431001001 is a modest number, since divided by 1001 gives 431 as remainder.

It is not an unprimeable number, because it can be changed into a prime (431001601) 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, 1190430 + ... + 1190791.

It is an arithmetic number, because the mean of its divisors is an integer number (108345601).

Almost surely, 2^431001001 is an apocalyptic number.

It is an amenable number.

431001001 is a deficient number, since it is larger than the sum of its proper divisors (2381403).

431001001 is a wasteful number, since it uses less digits than its factorization.

431001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381402.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 431001001 is about 20760.5636002494. The cubic root of 431001001 is about 755.3694672826.

Adding to 431001001 its reverse (100100134), we get a palindrome (531101135).

The spelling of 431001001 in words is "four hundred thirty-one million, one thousand, one".