107281981 has 8 divisors (see below), whose sum is σ = 111990104. Its totient is φ = 102669120.

The previous prime is 107281973. The next prime is 107281987. The reversal of 107281981 is 189182701.

It can be written as a sum of positive squares in 4 ways, for example, as 44222500 + 63059481 = 6650^2 + 7941^2 .

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 107281981 - 2³ = 107281973 is a prime.

It is a super-2 number, since 2×107281981² = 23018846894568722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 107281981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107281987) 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, 21510 + ... + 26023.

It is an arithmetic number, because the mean of its divisors is an integer number (13998763).

Almost surely, 2^107281981 is an apocalyptic number.

It is an amenable number.

107281981 is a deficient number, since it is larger than the sum of its proper divisors (4708123).

107281981 is an equidigital number, since it uses as much as digits as its factorization.

107281981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47631.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 107281981 is about 10357.7015307451. The cubic root of 107281981 is about 475.1626124686.

The spelling of 107281981 in words is "one hundred seven million, two hundred eighty-one thousand, nine hundred eighty-one".