132561997 has 2 divisors, whose sum is σ = 132561998. Its totient is φ = 132561996.

The previous prime is 132561973. The next prime is 132562019. The reversal of 132561997 is 799165231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79941481 + 52620516 = 8941^2 + 7254^2 .

It is an emirp because it is prime and its reverse (799165231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132561997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132561097) 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 as a sum of consecutive naturals, namely, 66280998 + 66280999.

It is an arithmetic number, because the mean of its divisors is an integer number (66280999).

Almost surely, 2^132561997 is an apocalyptic number.

It is an amenable number.

132561997 is a deficient number, since it is larger than the sum of its proper divisors (1).

132561997 is an equidigital number, since it uses as much as digits as its factorization.

132561997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 43.

The square root of 132561997 is about 11513.5570958761. The cubic root of 132561997 is about 509.8859119401.

The spelling of 132561997 in words is "one hundred thirty-two million, five hundred sixty-one thousand, nine hundred ninety-seven".