8124370721 has 8 divisors (see below), whose sum is σ = 8619310080. Its totient is φ = 7636165488.

The previous prime is 8124370711. The next prime is 8124370729. The reversal of 8124370721 is 1270734218.

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

It is a cyclic number.

It is not a de Polignac number, because 8124370721 - 2²⁶ = 8057261857 is a prime.

It is a super-2 number, since 2×8124370721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8124370729) 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, 1681046 + ... + 1685871.

It is an arithmetic number, because the mean of its divisors is an integer number (1077413760).

Almost surely, 2^8124370721 is an apocalyptic number.

It is an amenable number.

8124370721 is a deficient number, since it is larger than the sum of its proper divisors (494939359).

8124370721 is a wasteful number, since it uses less digits than its factorization.

8124370721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367063.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 8124370721 is about 90135.2912071626. The cubic root of 8124370721 is about 2010.3109772718.

The spelling of 8124370721 in words is "eight billion, one hundred twenty-four million, three hundred seventy thousand, seven hundred twenty-one".