9464319721 has 4 divisors (see below), whose sum is σ = 9495148432. Its totient is φ = 9433491012.

The previous prime is 9464319707. The next prime is 9464319727. The reversal of 9464319721 is 1279134649.

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 a cyclic number.

It is not a de Polignac number, because 9464319721 - 2⁷ = 9464319593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9464319727) 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, 15413895 + ... + 15414508.

It is an arithmetic number, because the mean of its divisors is an integer number (2373787108).

Almost surely, 2^9464319721 is an apocalyptic number.

It is an amenable number.

9464319721 is a deficient number, since it is larger than the sum of its proper divisors (30828711).

9464319721 is a wasteful number, since it uses less digits than its factorization.

9464319721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30828710.

The product of its digits is 326592, while the sum is 46.

The square root of 9464319721 is about 97284.7352928505. The cubic root of 9464319721 is about 2115.2569679971.

The spelling of 9464319721 in words is "nine billion, four hundred sixty-four million, three hundred nineteen thousand, seven hundred twenty-one".