8726991 has 24 divisors (see below), whose sum is σ = 14405760. Its totient is φ = 4601376.

The previous prime is 8726989. The next prime is 8727031. The reversal of 8726991 is 1996278.

8726991 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8726991 - 2¹ = 8726989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2320 + ... + 4778.

It is an arithmetic number, because the mean of its divisors is an integer number (600240).

Almost surely, 2^8726991 is an apocalyptic number.

8726991 is a deficient number, since it is larger than the sum of its proper divisors (5678769).

8726991 is a wasteful number, since it uses less digits than its factorization.

8726991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2482 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 8726991 is about 2954.1481005528. The cubic root of 8726991 is about 205.8834842403.

The spelling of 8726991 in words is "eight million, seven hundred twenty-six thousand, nine hundred ninety-one".