919221797 has 8 divisors (see below), whose sum is σ = 990286080. Its totient is φ = 848208240.

The previous prime is 919221781. The next prime is 919221839. The reversal of 919221797 is 797122919.

919221797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 919221797 - 2⁴ = 919221781 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 (919221997) 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, 30404 + ... + 52562.

It is an arithmetic number, because the mean of its divisors is an integer number (123785760).

Almost surely, 2^919221797 is an apocalyptic number.

It is an amenable number.

919221797 is a deficient number, since it is larger than the sum of its proper divisors (71064283).

919221797 is a wasteful number, since it uses less digits than its factorization.

919221797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25363.

The product of its digits is 142884, while the sum is 47.

The square root of 919221797 is about 30318.6707657179. The cubic root of 919221797 is about 972.3145200419.

The spelling of 919221797 in words is "nine hundred nineteen million, two hundred twenty-one thousand, seven hundred ninety-seven".