992678521 has 8 divisors (see below), whose sum is σ = 1016262720. Its totient is φ = 969117072.

The previous prime is 992678507. The next prime is 992678527. The reversal of 992678521 is 125876299.

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 992678521 - 2²¹ = 990581369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992678527) 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, 110175 + ... + 118843.

It is an arithmetic number, because the mean of its divisors is an integer number (127032840).

Almost surely, 2^992678521 is an apocalyptic number.

It is an amenable number.

992678521 is a deficient number, since it is larger than the sum of its proper divisors (23584199).

992678521 is a wasteful number, since it uses less digits than its factorization.

992678521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11375.

The product of its digits is 544320, while the sum is 49.

The square root of 992678521 is about 31506.8011864105. The cubic root of 992678521 is about 997.5535266490.

The spelling of 992678521 in words is "nine hundred ninety-two million, six hundred seventy-eight thousand, five hundred twenty-one".