100766981 has 12 divisors (see below), whose sum is σ = 118003680. Its totient is φ = 85793400.

The previous prime is 100766969. The next prime is 100766983. The reversal of 100766981 is 189667001.

It is not a de Polignac number, because 100766981 - 2¹⁰ = 100765957 is a prime.

It is a super-2 number, since 2×100766981² = 20307968919708722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100766983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 590 + ... + 14208.

It is an arithmetic number, because the mean of its divisors is an integer number (9833640).

Almost surely, 2^100766981 is an apocalyptic number.

It is an amenable number.

100766981 is a deficient number, since it is larger than the sum of its proper divisors (17236699).

100766981 is a wasteful number, since it uses less digits than its factorization.

100766981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13784 (or 13777 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 100766981 is about 10038.2757981637. The cubic root of 100766981 is about 465.3425325263.

The spelling of 100766981 in words is "one hundred million, seven hundred sixty-six thousand, nine hundred eighty-one".