813149 has 4 divisors (see below), whose sum is σ = 835164. Its totient is φ = 791136.

The previous prime is 813133. The next prime is 813157. The reversal of 813149 is 941318.

813149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 573049 + 240100 = 757^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 813149 - 2⁴ = 813133 is a prime.

It is a super-2 number, since 2×813149² = 1322422592402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10952 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (208791).

2⁸¹³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

813149 is a deficient number, since it is larger than the sum of its proper divisors (22015).

813149 is a wasteful number, since it uses less digits than its factorization.

813149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014.

The product of its digits is 864, while the sum is 26.

The square root of 813149 is about 901.7477474327. The cubic root of 813149 is about 93.3376174337.

The spelling of 813149 in words is "eight hundred thirteen thousand, one hundred forty-nine".