9970813 has 4 divisors (see below), whose sum is σ = 9977760. Its totient is φ = 9963868.

The previous prime is 9970811. The next prime is 9970847. The reversal of 9970813 is 3180799.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9970813 - 2¹ = 9970811 is a prime.

It is a super-2 number, since 2×9970813² = 198834223761938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9970811) 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, 433 + ... + 4486.

It is an arithmetic number, because the mean of its divisors is an integer number (2494440).

Almost surely, 2^9970813 is an apocalyptic number.

It is an amenable number.

9970813 is a deficient number, since it is larger than the sum of its proper divisors (6947).

9970813 is a wasteful number, since it uses less digits than its factorization.

9970813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9970813 is about 3157.6594179867. The cubic root of 9970813 is about 215.2336597962.

The spelling of 9970813 in words is "nine million, nine hundred seventy thousand, eight hundred thirteen".