813629 has 4 divisors (see below), whose sum is σ = 816060. Its totient is φ = 811200.

The previous prime is 813623. The next prime is 813647. The reversal of 813629 is 926318.

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

It can be written as a sum of positive squares in 2 ways, for example, as 806404 + 7225 = 898^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 813629 - 2⁴ = 813613 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813623) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 614 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (204015).

2⁸¹³⁶²⁹ is an apocalyptic number.

It is an amenable number.

813629 is a deficient number, since it is larger than the sum of its proper divisors (2431).

813629 is a wasteful number, since it uses less digits than its factorization.

813629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430.

The product of its digits is 2592, while the sum is 29.

The square root of 813629 is about 902.0138579867. The cubic root of 813629 is about 93.3559794821.

The spelling of 813629 in words is "eight hundred thirteen thousand, six hundred twenty-nine".