431004721 has 16 divisors (see below), whose sum is σ = 521829760. Its totient is φ = 347742720.

The previous prime is 431004709. The next prime is 431004727. The reversal of 431004721 is 127400134.

It is a cyclic number.

It is not a de Polignac number, because 431004721 - 2⁷ = 431004593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431004692 and 431004701.

It is not an unprimeable number, because it can be changed into a prime (431004727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10561 + ... + 31201.

It is an arithmetic number, because the mean of its divisors is an integer number (32614360).

Almost surely, 2^431004721 is an apocalyptic number.

It is an amenable number.

431004721 is a deficient number, since it is larger than the sum of its proper divisors (90825039).

431004721 is a wasteful number, since it uses less digits than its factorization.

431004721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20824.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 431004721 is about 20760.6531929995. The cubic root of 431004721 is about 755.3716404921.

Adding to 431004721 its reverse (127400134), we get a palindrome (558404855).

The spelling of 431004721 in words is "four hundred thirty-one million, four thousand, seven hundred twenty-one".