406596689 has 4 divisors (see below), whose sum is σ = 406658100. Its totient is φ = 406535280.

The previous prime is 406596679. The next prime is 406596709. The reversal of 406596689 is 986695604.

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 360696064 + 45900625 = 18992^2 + 6775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406596689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406596689.

It is not an unprimeable number, because it can be changed into a prime (406596649) 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, 19382 + ... + 34479.

It is an arithmetic number, because the mean of its divisors is an integer number (101664525).

Almost surely, 2^406596689 is an apocalyptic number.

It is an amenable number.

406596689 is a deficient number, since it is larger than the sum of its proper divisors (61411).

406596689 is an equidigital number, since it uses as much as digits as its factorization.

406596689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61410.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The square root of 406596689 is about 20164.2428323009. The cubic root of 406596689 is about 740.8346371585.

The spelling of 406596689 in words is "four hundred six million, five hundred ninety-six thousand, six hundred eighty-nine".