9891445 has 4 divisors (see below), whose sum is σ = 11869740. Its totient is φ = 7913152.

The previous prime is 9891439. The next prime is 9891451. The reversal of 9891445 is 5441989.

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

It is an interprime number because it is at equal distance from previous prime (9891439) and next prime (9891451).

It can be written as a sum of positive squares in 2 ways, for example, as 3908529 + 5982916 = 1977^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 9891445 - 2¹⁵ = 9858677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9891398 and 9891407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989140 + ... + 989149.

It is an arithmetic number, because the mean of its divisors is an integer number (2967435).

Almost surely, 2^9891445 is an apocalyptic number.

It is an amenable number.

9891445 is a deficient number, since it is larger than the sum of its proper divisors (1978295).

9891445 is a wasteful number, since it uses less digits than its factorization.

9891445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978294.

The product of its digits is 51840, while the sum is 40.

The square root of 9891445 is about 3145.0667719462. The cubic root of 9891445 is about 214.6610487558.

The spelling of 9891445 in words is "nine million, eight hundred ninety-one thousand, four hundred forty-five".