406931609 has 4 divisors (see below), whose sum is σ = 465064704. Its totient is φ = 348798516.

The previous prime is 406931599. The next prime is 406931611. The reversal of 406931609 is 906139604.

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 406931609 - 2⁸ = 406931353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406931659) 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, 29066537 + ... + 29066550.

It is an arithmetic number, because the mean of its divisors is an integer number (116266176).

Almost surely, 2^406931609 is an apocalyptic number.

It is an amenable number.

406931609 is a deficient number, since it is larger than the sum of its proper divisors (58133095).

406931609 is an equidigital number, since it uses as much as digits as its factorization.

406931609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58133094.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 406931609 is about 20172.5459226147. The cubic root of 406931609 is about 741.0379936603.

The spelling of 406931609 in words is "four hundred six million, nine hundred thirty-one thousand, six hundred nine".