8722641 has 4 divisors (see below), whose sum is σ = 11630192. Its totient is φ = 5815092.

The previous prime is 8722631. The next prime is 8722643. The reversal of 8722641 is 1462278.

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 not a de Polignac number, because 8722641 - 2¹⁰ = 8721617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8722599 and 8722608.

It is not an unprimeable number, because it can be changed into a prime (8722643) 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, 1453771 + ... + 1453776.

It is an arithmetic number, because the mean of its divisors is an integer number (2907548).

Almost surely, 2^8722641 is an apocalyptic number.

It is an amenable number.

8722641 is a deficient number, since it is larger than the sum of its proper divisors (2907551).

8722641 is a wasteful number, since it uses less digits than its factorization.

8722641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907550.

The product of its digits is 5376, while the sum is 30.

The square root of 8722641 is about 2953.4117559189. The cubic root of 8722641 is about 205.8492707677.

The spelling of 8722641 in words is "eight million, seven hundred twenty-two thousand, six hundred forty-one".