920830993 has 8 divisors (see below), whose sum is σ = 979950312. Its totient is φ = 862262016.

The previous prime is 920830973. The next prime is 920831017. The reversal of 920830993 is 399038029.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 661878529 + 258952464 = 25727^2 + 16092^2 .

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 920830993 - 2⁵ = 920830961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920830903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134130 + ... + 140827.

It is an arithmetic number, because the mean of its divisors is an integer number (122493789).

Almost surely, 2^920830993 is an apocalyptic number.

It is an amenable number.

920830993 is a deficient number, since it is larger than the sum of its proper divisors (59119319).

920830993 is a wasteful number, since it uses less digits than its factorization.

920830993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275171.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 920830993 is about 30345.1971982388. The cubic root of 920830993 is about 972.8815694390.

The spelling of 920830993 in words is "nine hundred twenty million, eight hundred thirty thousand, nine hundred ninety-three".