406781683 has 24 divisors (see below), whose sum is σ = 517785264. Its totient is φ = 316008000.

The previous prime is 406781681. The next prime is 406781689. The reversal of 406781683 is 386187604.

It is not a de Polignac number, because 406781683 - 2¹ = 406781681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406781681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213033 + ... + 214933.

It is an arithmetic number, because the mean of its divisors is an integer number (21574386).

Almost surely, 2^406781683 is an apocalyptic number.

406781683 is a deficient number, since it is larger than the sum of its proper divisors (111003581).

406781683 is a wasteful number, since it uses less digits than its factorization.

406781683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 406781683 is about 20168.8294900820. The cubic root of 406781683 is about 740.9469754918.

The spelling of 406781683 in words is "four hundred six million, seven hundred eighty-one thousand, six hundred eighty-three".