132749681 has 2 divisors, whose sum is σ = 132749682. Its totient is φ = 132749680.

The previous prime is 132749663. The next prime is 132749717. The reversal of 132749681 is 186947231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132135025 + 614656 = 11495^2 + 784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132749681 is a prime.

It is a super-2 number, since 2×132749681² = 35244955611203522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (132749611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66374840 + 66374841.

It is an arithmetic number, because the mean of its divisors is an integer number (66374841).

Almost surely, 2^132749681 is an apocalyptic number.

It is an amenable number.

132749681 is a deficient number, since it is larger than the sum of its proper divisors (1).

132749681 is an equidigital number, since it uses as much as digits as its factorization.

132749681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 132749681 is about 11521.7047783737. The cubic root of 132749681 is about 510.1264341151.

The spelling of 132749681 in words is "one hundred thirty-two million, seven hundred forty-nine thousand, six hundred eighty-one".