406806767 has 4 divisors (see below), whose sum is σ = 408195480. Its totient is φ = 405418056.

The previous prime is 406806737. The next prime is 406806779. The reversal of 406806767 is 767608604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406806767 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 (406806737) 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 3 ways as a sum of consecutive naturals, for example, 693917 + ... + 694502.

It is an arithmetic number, because the mean of its divisors is an integer number (102048870).

Almost surely, 2^406806767 is an apocalyptic number.

406806767 is a deficient number, since it is larger than the sum of its proper divisors (1388713).

406806767 is a wasteful number, since it uses less digits than its factorization.

406806767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388712.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 406806767 is about 20169.4513311592. The cubic root of 406806767 is about 740.9622052269.

The spelling of 406806767 in words is "four hundred six million, eight hundred six thousand, seven hundred sixty-seven".