8974196021 has 4 divisors (see below), whose sum is σ = 10256224032. Its totient is φ = 7692168012.

The previous prime is 8974195991. The next prime is 8974196039. The reversal of 8974196021 is 1206914798.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8974196021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8974196081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641013995 + ... + 641014008.

It is an arithmetic number, because the mean of its divisors is an integer number (2564056008).

Almost surely, 2^8974196021 is an apocalyptic number.

It is an amenable number.

8974196021 is a deficient number, since it is larger than the sum of its proper divisors (1282028011).

8974196021 is a wasteful number, since it uses less digits than its factorization.

8974196021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282028010.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 8974196021 is about 94732.2332735801. The cubic root of 8974196021 is about 2078.0939779419.

The spelling of 8974196021 in words is "eight billion, nine hundred seventy-four million, one hundred ninety-six thousand, twenty-one".