406691607 has 8 divisors (see below), whose sum is σ = 619720576. Its totient is φ = 232395192.

The previous prime is 406691591. The next prime is 406691627. The reversal of 406691607 is 706196604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406691607 - 2⁴ = 406691591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406691627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9683113 + ... + 9683154.

It is an arithmetic number, because the mean of its divisors is an integer number (77465072).

Almost surely, 2^406691607 is an apocalyptic number.

406691607 is a deficient number, since it is larger than the sum of its proper divisors (213028969).

406691607 is a wasteful number, since it uses less digits than its factorization.

406691607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19366277.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 406691607 is about 20166.5963166817. The cubic root of 406691607 is about 740.8922807423.

The spelling of 406691607 in words is "four hundred six million, six hundred ninety-one thousand, six hundred seven".