906491023 has 4 divisors (see below), whose sum is σ = 907056720. Its totient is φ = 905925328.

The previous prime is 906490999. The next prime is 906491029. The reversal of 906491023 is 320194609.

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-906491023 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 906491023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906491029) 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, 280438 + ... + 283651.

It is an arithmetic number, because the mean of its divisors is an integer number (226764180).

Almost surely, 2^906491023 is an apocalyptic number.

906491023 is a deficient number, since it is larger than the sum of its proper divisors (565697).

906491023 is a wasteful number, since it uses less digits than its factorization.

906491023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565696.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 906491023 is about 30107.9893549868. The cubic root of 906491023 is about 967.8049429250.

The spelling of 906491023 in words is "nine hundred six million, four hundred ninety-one thousand, twenty-three".