813901006 has 4 divisors (see below), whose sum is σ = 1220851512. Its totient is φ = 406950502.

The previous prime is 813900961. The next prime is 813901051. The reversal of 813901006 is 600109318.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (813900961) and next prime (813901051).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203475250 + ... + 203475253.

It is an arithmetic number, because the mean of its divisors is an integer number (305212878).

Almost surely, 2^813901006 is an apocalyptic number.

813901006 is a deficient number, since it is larger than the sum of its proper divisors (406950506).

813901006 is a wasteful number, since it uses less digits than its factorization.

813901006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406950505.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 813901006 is about 28528.9503136726. The cubic root of 813901006 is about 933.6638166674.

The spelling of 813901006 in words is "eight hundred thirteen million, nine hundred one thousand, six".