981738905 has 8 divisors (see below), whose sum is σ = 1346384832. Its totient is φ = 673192368.

The previous prime is 981738893. The next prime is 981738929. The reversal of 981738905 is 509837189.

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 981738905 - 2⁶ = 981738841 is a prime.

It is a super-2 number, since 2×981738905² = 1927622555181198050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14024807 + ... + 14024876.

It is an arithmetic number, because the mean of its divisors is an integer number (168298104).

Almost surely, 2^981738905 is an apocalyptic number.

It is an amenable number.

981738905 is a deficient number, since it is larger than the sum of its proper divisors (364645927).

981738905 is a wasteful number, since it uses less digits than its factorization.

981738905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28049695.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 981738905 is about 31332.7130169093. The cubic root of 981738905 is about 993.8755358465.

The spelling of 981738905 in words is "nine hundred eighty-one million, seven hundred thirty-eight thousand, nine hundred five".