8957158921 has 8 divisors (see below), whose sum is σ = 9286677000. Its totient is φ = 8629017600.

The previous prime is 8957158901. The next prime is 8957158943. The reversal of 8957158921 is 1298517598.

It can be written as a sum of positive squares in 4 ways, for example, as 4278598921 + 4678560000 = 65411^2 + 68400^2 .

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 8957158921 - 2¹⁵ = 8957126153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8957158901) 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, 330930 + ... + 356971.

It is an arithmetic number, because the mean of its divisors is an integer number (1160834625).

Almost surely, 2^8957158921 is an apocalyptic number.

It is an amenable number.

8957158921 is a deficient number, since it is larger than the sum of its proper divisors (329518079).

8957158921 is a wasteful number, since it uses less digits than its factorization.

8957158921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688379.

The product of its digits is 1814400, while the sum is 55.

The square root of 8957158921 is about 94642.2681522373. The cubic root of 8957158921 is about 2076.7780894686.

The spelling of 8957158921 in words is "eight billion, nine hundred fifty-seven million, one hundred fifty-eight thousand, nine hundred twenty-one".