9430494721 has 4 divisors (see below), whose sum is σ = 9451498500. Its totient is φ = 9409490944.

The previous prime is 9430494709. The next prime is 9430494727. The reversal of 9430494721 is 1274940349.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2161227121 + 7269267600 = 46489^2 + 85260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9430494721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9430494727) 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, 10501216 + ... + 10502113.

It is an arithmetic number, because the mean of its divisors is an integer number (2362874625).

Almost surely, 2^9430494721 is an apocalyptic number.

It is an amenable number.

9430494721 is a deficient number, since it is larger than the sum of its proper divisors (21003779).

9430494721 is a wasteful number, since it uses less digits than its factorization.

9430494721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21003778.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 9430494721 is about 97110.7343242754. The cubic root of 9430494721 is about 2112.7340195026.

The spelling of 9430494721 in words is "nine billion, four hundred thirty million, four hundred ninety-four thousand, seven hundred twenty-one".