981224191 has 8 divisors (see below), whose sum is σ = 998517168. Its totient is φ = 964080000.

The previous prime is 981224147. The next prime is 981224197. The reversal of 981224191 is 191422189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981224191 - 2⁹ = 981223679 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 981224191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981224197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23850 + ... + 50311.

It is an arithmetic number, because the mean of its divisors is an integer number (124814646).

Almost surely, 2^981224191 is an apocalyptic number.

981224191 is a deficient number, since it is larger than the sum of its proper divisors (17292977).

981224191 is a wasteful number, since it uses less digits than its factorization.

981224191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74393.

The product of its digits is 10368, while the sum is 37.

The square root of 981224191 is about 31324.4982561573. The cubic root of 981224191 is about 993.7018131191.

The spelling of 981224191 in words is "nine hundred eighty-one million, two hundred twenty-four thousand, one hundred ninety-one".