10179981 has 24 divisors (see below), whose sum is σ = 16889600. Its totient is φ = 5787936.

The previous prime is 10179977. The next prime is 10179989. The reversal of 10179981 is 18997101.

It is not a de Polignac number, because 10179981 - 2² = 10179977 is a prime.

It is a super-2 number, since 2×10179981² = 207264026320722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10179989) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 21756 + ... + 22218.

Almost surely, 2^10179981 is an apocalyptic number.

It is an amenable number.

10179981 is a deficient number, since it is larger than the sum of its proper divisors (6709619).

10179981 is a wasteful number, since it uses less digits than its factorization.

10179981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 10179981 is about 3190.6082492215. The cubic root of 10179981 is about 216.7283156590.

The spelling of 10179981 in words is "ten million, one hundred seventy-nine thousand, nine hundred eighty-one".