8921357 has 4 divisors (see below), whose sum is σ = 9229020. Its totient is φ = 8613696.

The previous prime is 8921333. The next prime is 8921359. The reversal of 8921357 is 7531298.

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 2515396 + 6405961 = 1586^2 + 2531^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8921357 is a prime.

It is a super-2 number, since 2×8921357² = 159181221442898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153788 + ... + 153845.

It is an arithmetic number, because the mean of its divisors is an integer number (2307255).

Almost surely, 2^8921357 is an apocalyptic number.

It is an amenable number.

8921357 is a deficient number, since it is larger than the sum of its proper divisors (307663).

8921357 is a wasteful number, since it uses less digits than its factorization.

8921357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307662.

The product of its digits is 15120, while the sum is 35.

The square root of 8921357 is about 2986.8640745772. The cubic root of 8921357 is about 207.4007421922.

The spelling of 8921357 in words is "eight million, nine hundred twenty-one thousand, three hundred fifty-seven".