981079646 has 8 divisors (see below), whose sum is σ = 1472478744. Its totient is φ = 490253400.

The previous prime is 981079637. The next prime is 981079681. The reversal of 981079646 is 646970189.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 981079594 and 981079603.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 138905 + ... + 145796.

It is an arithmetic number, because the mean of its divisors is an integer number (184059843).

Almost surely, 2^981079646 is an apocalyptic number.

981079646 is a deficient number, since it is larger than the sum of its proper divisors (491399098).

981079646 is a wasteful number, since it uses less digits than its factorization.

981079646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286426.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 981079646 is about 31322.1909514644. The cubic root of 981079646 is about 993.6530163597.

The spelling of 981079646 in words is "nine hundred eighty-one million, seventy-nine thousand, six hundred forty-six".