922991013 has 24 divisors (see below), whose sum is σ = 1613297088. Its totient is φ = 496397952.

The previous prime is 922991009. The next prime is 922991039. The reversal of 922991013 is 310199229.

It is a happy number.

It is not a de Polignac number, because 922991013 - 2² = 922991009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (922991053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429831 + ... + 431972.

It is an arithmetic number, because the mean of its divisors is an integer number (67220712).

Almost surely, 2^922991013 is an apocalyptic number.

It is an amenable number.

922991013 is a deficient number, since it is larger than the sum of its proper divisors (690306075).

922991013 is a wasteful number, since it uses less digits than its factorization.

922991013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861833 (or 861830 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 922991013 is about 30380.7671562125. The cubic root of 922991013 is about 973.6416809262.

The spelling of 922991013 in words is "nine hundred twenty-two million, nine hundred ninety-one thousand, thirteen".