9057379721 has 16 divisors (see below), whose sum is σ = 9944617536. Its totient is φ = 8197565376.

The previous prime is 9057379717. The next prime is 9057379841. The reversal of 9057379721 is 1279737509.

9057379721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9057379721 - 2² = 9057379717 is a prime.

It is a super-2 number, since 2×9057379721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9057379721.

It is not an unprimeable number, because it can be changed into a prime (9057379321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1376786 + ... + 1383348.

It is an arithmetic number, because the mean of its divisors is an integer number (621538596).

Almost surely, 2^9057379721 is an apocalyptic number.

It is an amenable number.

9057379721 is a deficient number, since it is larger than the sum of its proper divisors (887237815).

9057379721 is a wasteful number, since it uses less digits than its factorization.

9057379721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632.

The product of its (nonzero) digits is 833490, while the sum is 50.

The square root of 9057379721 is about 95170.2670007813. The cubic root of 9057379721 is about 2084.4950035920.

The spelling of 9057379721 in words is "nine billion, fifty-seven million, three hundred seventy-nine thousand, seven hundred twenty-one".