971813 has 4 divisors (see below), whose sum is σ = 974880. Its totient is φ = 968748.

The previous prime is 971783. The next prime is 971821. The reversal of 971813 is 318179.

971813 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 971813 - 2¹⁰ = 970789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 971813.

It is not an unprimeable number, because it can be changed into a prime (971833) 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, 995 + ... + 1712.

It is an arithmetic number, because the mean of its divisors is an integer number (243720).

2⁹⁷¹⁸¹³ is an apocalyptic number.

It is an amenable number.

971813 is a deficient number, since it is larger than the sum of its proper divisors (3067).

971813 is a wasteful number, since it uses less digits than its factorization.

971813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066.

The product of its digits is 1512, while the sum is 29.

The square root of 971813 is about 985.8057618010. The cubic root of 971813 is about 99.0514645862.

The spelling of 971813 in words is "nine hundred seventy-one thousand, eight hundred thirteen".