9452687721 has 16 divisors (see below), whose sum is σ = 13341408960. Its totient is φ = 5942986560.

The previous prime is 9452687711. The next prime is 9452687723. The reversal of 9452687721 is 1277862549.

It is a happy number.

It is not a de Polignac number, because 9452687721 - 2⁵ = 9452687689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9452687723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1259650 + ... + 1267131.

It is an arithmetic number, because the mean of its divisors is an integer number (833838060).

Almost surely, 2^9452687721 is an apocalyptic number.

It is an amenable number.

9452687721 is a deficient number, since it is larger than the sum of its proper divisors (3888721239).

9452687721 is a wasteful number, since it uses less digits than its factorization.

9452687721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526856.

The product of its digits is 1693440, while the sum is 51.

The square root of 9452687721 is about 97224.9336384448. The cubic root of 9452687721 is about 2114.3900363111.

The spelling of 9452687721 in words is "nine billion, four hundred fifty-two million, six hundred eighty-seven thousand, seven hundred twenty-one".