813002 has 4 divisors (see below), whose sum is σ = 1219506. Its totient is φ = 406500.

The previous prime is 812969. The next prime is 813013. The reversal of 813002 is 200318.

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

It can be written as a sum of positive squares in only one way, i.e., 564001 + 249001 = 751^2 + 499^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203249 + ... + 203252.

2⁸¹³⁰⁰² is an apocalyptic number.

813002 is a deficient number, since it is larger than the sum of its proper divisors (406504).

813002 is a wasteful number, since it uses less digits than its factorization.

813002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406503.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 813002 is about 901.6662353665. Note that the first 3 decimals coincide. The cubic root of 813002 is about 93.3319926111.

The spelling of 813002 in words is "eight hundred thirteen thousand, two".