8920397 has 4 divisors (see below), whose sum is σ = 8928480. Its totient is φ = 8912316.

The previous prime is 8920391. The next prime is 8920403. The reversal of 8920397 is 7930298.

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.

It is an interprime number because it is at equal distance from previous prime (8920391) and next prime (8920403).

It is a cyclic number.

It is not a de Polignac number, because 8920397 - 2⁸ = 8920141 is a prime.

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 8920397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8920391) 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, 2063 + ... + 4700.

It is an arithmetic number, because the mean of its divisors is an integer number (2232120).

Almost surely, 2^8920397 is an apocalyptic number.

It is an amenable number.

8920397 is a deficient number, since it is larger than the sum of its proper divisors (8083).

8920397 is a wasteful number, since it uses less digits than its factorization.

8920397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 8920397 is about 2986.7033665900. The cubic root of 8920397 is about 207.3933026717.

Subtracting from 8920397 its reverse (7930298), we obtain a palindrome (990099).

The spelling of 8920397 in words is "eight million, nine hundred twenty thousand, three hundred ninety-seven".