109010981 has 2 divisors, whose sum is σ = 109010982. Its totient is φ = 109010980.

The previous prime is 109010969. The next prime is 109011043. The reversal of 109010981 is 189010901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 538756 = 10415^2 + 734^2 .

It is an emirp because it is prime and its reverse (189010901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109010981 - 2²⁶ = 41902117 is a prime.

It is a super-2 number, since 2×109010981² = 23766787957164722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109010921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54505490 + 54505491.

It is an arithmetic number, because the mean of its divisors is an integer number (54505491).

Almost surely, 2^109010981 is an apocalyptic number.

It is an amenable number.

109010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

109010981 is an equidigital number, since it uses as much as digits as its factorization.

109010981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 109010981 is about 10440.8323901881. The cubic root of 109010981 is about 477.7016587446.

The spelling of 109010981 in words is "one hundred nine million, ten thousand, nine hundred eighty-one".