8941190721 has 4 divisors (see below), whose sum is σ = 11921587632. Its totient is φ = 5960793812.

The previous prime is 8941190689. The next prime is 8941190777. The reversal of 8941190721 is 1270911498.

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 not a de Polignac number, because 8941190721 - 2⁵ = 8941190689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8941195721) 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, 1490198451 + ... + 1490198456.

It is an arithmetic number, because the mean of its divisors is an integer number (2980396908).

Almost surely, 2^8941190721 is an apocalyptic number.

It is an amenable number.

8941190721 is a deficient number, since it is larger than the sum of its proper divisors (2980396911).

8941190721 is a wasteful number, since it uses less digits than its factorization.

8941190721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980396910.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 8941190721 is about 94557.8696936432. The cubic root of 8941190721 is about 2075.5432435289.

The spelling of 8941190721 in words is "eight billion, nine hundred forty-one million, one hundred ninety thousand, seven hundred twenty-one".