916981806 has 16 divisors (see below), whose sum is σ = 1975037904. Its totient is φ = 282148224.

The previous prime is 916981801. The next prime is 916981823. The reversal of 916981806 is 608189619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916981801) 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, 5878011 + ... + 5878166.

It is an arithmetic number, because the mean of its divisors is an integer number (123439869).

Almost surely, 2^916981806 is an apocalyptic number.

916981806 is an abundant number, since it is smaller than the sum of its proper divisors (1058056098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

916981806 is a wasteful number, since it uses less digits than its factorization.

916981806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11756195.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 916981806 is about 30281.7074485571. The cubic root of 916981806 is about 971.5240879242.

The spelling of 916981806 in words is "nine hundred sixteen million, nine hundred eighty-one thousand, eight hundred six".