132401981 has 2 divisors, whose sum is σ = 132401982. Its totient is φ = 132401980.

The previous prime is 132401977. The next prime is 132401999. The reversal of 132401981 is 189104231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95374756 + 37027225 = 9766^2 + 6085^2 .

It is a cyclic number.

It is not a de Polignac number, because 132401981 - 2² = 132401977 is a prime.

It is a super-2 number, since 2×132401981² = 35060569145448722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132401921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66200990 + 66200991.

It is an arithmetic number, because the mean of its divisors is an integer number (66200991).

Almost surely, 2^132401981 is an apocalyptic number.

It is an amenable number.

132401981 is a deficient number, since it is larger than the sum of its proper divisors (1).

132401981 is an equidigital number, since it uses as much as digits as its factorization.

132401981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 132401981 is about 11506.6059722231. The cubic root of 132401981 is about 509.6806677095.

The spelling of 132401981 in words is "one hundred thirty-two million, four hundred one thousand, nine hundred eighty-one".