916017981 has 8 divisors (see below), whose sum is σ = 1222986624. Its totient is φ = 609864000.

The previous prime is 916017979. The next prime is 916017989. The reversal of 916017981 is 189710619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 916017981 - 2¹ = 916017979 is a prime.

It is a super-2 number, since 2×916017981² = 1678177883030632722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916017989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201036 + ... + 205541.

It is an arithmetic number, because the mean of its divisors is an integer number (152873328).

Almost surely, 2^916017981 is an apocalyptic number.

It is an amenable number.

916017981 is a deficient number, since it is larger than the sum of its proper divisors (306968643).

916017981 is a wasteful number, since it uses less digits than its factorization.

916017981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407331.

The product of its (nonzero) digits is 27216, while the sum is 42.

The square root of 916017981 is about 30265.7889538667. The cubic root of 916017981 is about 971.1835840885.

The spelling of 916017981 in words is "nine hundred sixteen million, seventeen thousand, nine hundred eighty-one".