812539006 has 4 divisors (see below), whose sum is σ = 1218808512. Its totient is φ = 406269502.

The previous prime is 812538997. The next prime is 812539031. The reversal of 812539006 is 600935218.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 203134750 + ... + 203134753.

It is an arithmetic number, because the mean of its divisors is an integer number (304702128).

Almost surely, 2^812539006 is an apocalyptic number.

812539006 is a deficient number, since it is larger than the sum of its proper divisors (406269506).

812539006 is a wasteful number, since it uses less digits than its factorization.

812539006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406269505.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 812539006 is about 28505.0698297689. The cubic root of 812539006 is about 933.1427213069.

The spelling of 812539006 in words is "eight hundred twelve million, five hundred thirty-nine thousand, six".