921017797 has 8 divisors (see below), whose sum is σ = 1052827776. Its totient is φ = 789266832.

The previous prime is 921017791. The next prime is 921017803. The reversal of 921017797 is 797710129.

It is an interprime number because it is at equal distance from previous prime (921017791) and next prime (921017803).

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 921017797 - 2¹⁵ = 920985029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921017791) 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, 26328 + ... + 50350.

It is an arithmetic number, because the mean of its divisors is an integer number (131603472).

Almost surely, 2^921017797 is an apocalyptic number.

It is an amenable number.

921017797 is a deficient number, since it is larger than the sum of its proper divisors (131809979).

921017797 is a wasteful number, since it uses less digits than its factorization.

921017797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29507.

The product of its (nonzero) digits is 55566, while the sum is 43.

The square root of 921017797 is about 30348.2750251147. The cubic root of 921017797 is about 972.9473527305.

The spelling of 921017797 in words is "nine hundred twenty-one million, seventeen thousand, seven hundred ninety-seven".