921830478357 has 8 divisors (see below), whose sum is σ = 1229427984384. Its totient is φ = 614393312288.

The previous prime is 921830478347. The next prime is 921830478377. The reversal of 921830478357 is 753874038129.

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 921830478357 - 2³⁵ = 887470739989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 921830478297 and 921830478306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921830478347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40071573 + ... + 40094570.

It is an arithmetic number, because the mean of its divisors is an integer number (153678498048).

Almost surely, 2^921830478357 is an apocalyptic number.

It is an amenable number.

921830478357 is a deficient number, since it is larger than the sum of its proper divisors (307597506027).

921830478357 is a wasteful number, since it uses less digits than its factorization.

921830478357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80169979.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 921830478357 in words is "nine hundred twenty-one billion, eight hundred thirty million, four hundred seventy-eight thousand, three hundred fifty-seven".