8721937 has 8 divisors (see below), whose sum is σ = 10065536. Its totient is φ = 7402752.

The previous prime is 8721929. The next prime is 8721941. The reversal of 8721937 is 7391278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8721937 - 2³ = 8721929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8721896 and 8721905.

It is not an unprimeable number, because it can be changed into a prime (8721907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5328 + ... + 6769.

It is an arithmetic number, because the mean of its divisors is an integer number (1258192).

Almost surely, 2^8721937 is an apocalyptic number.

It is an amenable number.

8721937 is a deficient number, since it is larger than the sum of its proper divisors (1343599).

8721937 is a wasteful number, since it uses less digits than its factorization.

8721937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12207.

The product of its digits is 21168, while the sum is 37.

The square root of 8721937 is about 2953.2925693199. The cubic root of 8721937 is about 205.8437326214.

It can be divided in two parts, 872 and 1937, that added together give a square (2809 = 53²).

The spelling of 8721937 in words is "eight million, seven hundred twenty-one thousand, nine hundred thirty-seven".