8921137 has 4 divisors (see below), whose sum is σ = 8928496. Its totient is φ = 8913780.

The previous prime is 8921131. The next prime is 8921161. The reversal of 8921137 is 7311298.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7311298 = 2 ⋅3655649.

It is a cyclic number.

It is not a de Polignac number, because 8921137 - 2¹⁹ = 8396849 is a prime.

It is a Duffinian number.

8921137 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8921099 and 8921108.

It is not an unprimeable number, because it can be changed into a prime (8921131) 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, 1383 + ... + 4444.

It is an arithmetic number, because the mean of its divisors is an integer number (2232124).

Almost surely, 2^8921137 is an apocalyptic number.

It is an amenable number.

8921137 is a deficient number, since it is larger than the sum of its proper divisors (7359).

8921137 is a wasteful number, since it uses less digits than its factorization.

8921137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7358.

The product of its digits is 3024, while the sum is 31.

The square root of 8921137 is about 2986.8272464272. The cubic root of 8921137 is about 207.3990373492.

The spelling of 8921137 in words is "eight million, nine hundred twenty-one thousand, one hundred thirty-seven".