9971893 has 4 divisors (see below), whose sum is σ = 10029708. Its totient is φ = 9914080.

The previous prime is 9971887. The next prime is 9971917. The reversal of 9971893 is 3981799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3981799 = 1093 ⋅3643.

It can be written as a sum of positive squares in 2 ways, for example, as 4028049 + 5943844 = 2007^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 9971893 - 2⁵ = 9971861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971393) 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, 28648 + ... + 28993.

It is an arithmetic number, because the mean of its divisors is an integer number (2507427).

Almost surely, 2^9971893 is an apocalyptic number.

It is an amenable number.

9971893 is a deficient number, since it is larger than the sum of its proper divisors (57815).

9971893 is a wasteful number, since it uses less digits than its factorization.

9971893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57814.

The product of its digits is 122472, while the sum is 46.

The square root of 9971893 is about 3157.8304260995. The cubic root of 9971893 is about 215.2414306089.

The spelling of 9971893 in words is "nine million, nine hundred seventy-one thousand, eight hundred ninety-three".