978929011 has 4 divisors (see below), whose sum is σ = 979060432. Its totient is φ = 978797592.

The previous prime is 978929009. The next prime is 978929033. The reversal of 978929011 is 110929879.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 978929011 - 2¹ = 978929009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978929041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53820 + ... + 69673.

It is an arithmetic number, because the mean of its divisors is an integer number (244765108).

Almost surely, 2^978929011 is an apocalyptic number.

978929011 is a deficient number, since it is larger than the sum of its proper divisors (131421).

978929011 is a wasteful number, since it uses less digits than its factorization.

978929011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131420.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 978929011 is about 31287.8412646191. The cubic root of 978929011 is about 992.9264194348.

The spelling of 978929011 in words is "nine hundred seventy-eight million, nine hundred twenty-nine thousand, eleven".