132109981 has 2 divisors, whose sum is σ = 132109982. Its totient is φ = 132109980.

The previous prime is 132109979. The next prime is 132110039. The reversal of 132109981 is 189901231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131560900 + 549081 = 11470^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 132109981 - 2¹ = 132109979 is a prime.

It is a super-2 number, since 2×132109981² = 34906094159640722, which contains 22 as substring.

Together with 132109979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132109961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66054990 + 66054991.

It is an arithmetic number, because the mean of its divisors is an integer number (66054991).

Almost surely, 2^132109981 is an apocalyptic number.

It is an amenable number.

132109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

132109981 is an equidigital number, since it uses as much as digits as its factorization.

132109981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 132109981 is about 11493.9106051857. The cubic root of 132109981 is about 509.3057078188.

The spelling of 132109981 in words is "one hundred thirty-two million, one hundred nine thousand, nine hundred eighty-one".