8424722921 has 8 divisors (see below), whose sum is σ = 8483517504. Its totient is φ = 8366131600.

The previous prime is 8424722903. The next prime is 8424722939. The reversal of 8424722921 is 1292274248.

It is an interprime number because it is at equal distance from previous prime (8424722903) and next prime (8424722939).

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 8424722921 - 2⁶ = 8424722857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8424722021) 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, 32846 + ... + 133896.

It is an arithmetic number, because the mean of its divisors is an integer number (1060439688).

Almost surely, 2^8424722921 is an apocalyptic number.

It is an amenable number.

8424722921 is a deficient number, since it is larger than the sum of its proper divisors (58794583).

8424722921 is a wasteful number, since it uses less digits than its factorization.

8424722921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101631.

The product of its digits is 129024, while the sum is 41.

The square root of 8424722921 is about 91786.2893955301. The cubic root of 8424722921 is about 2034.7850687487.

The spelling of 8424722921 in words is "eight billion, four hundred twenty-four million, seven hundred twenty-two thousand, nine hundred twenty-one".