6406923 has 4 divisors (see below), whose sum is σ = 8542568. Its totient is φ = 4271280.

The previous prime is 6406919. The next prime is 6406931. The reversal of 6406923 is 3296046.

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

It is not a de Polignac number, because 6406923 - 2² = 6406919 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406913) 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, 1067818 + ... + 1067823.

It is an arithmetic number, because the mean of its divisors is an integer number (2135642).

Almost surely, 2^6406923 is an apocalyptic number.

6406923 is a deficient number, since it is larger than the sum of its proper divisors (2135645).

6406923 is a wasteful number, since it uses less digits than its factorization.

6406923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135644.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 6406923 is about 2531.1900363268. The cubic root of 6406923 is about 185.7304744693.

The spelling of 6406923 in words is "six million, four hundred six thousand, nine hundred twenty-three".