131766601 has 2 divisors, whose sum is σ = 131766602. Its totient is φ = 131766600.

The previous prime is 131766599. The next prime is 131766617. The reversal of 131766601 is 106667131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95043001 + 36723600 = 9749^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 131766601 - 2¹ = 131766599 is a prime.

Together with 131766599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131766671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65883300 + 65883301.

It is an arithmetic number, because the mean of its divisors is an integer number (65883301).

Almost surely, 2^131766601 is an apocalyptic number.

It is an amenable number.

131766601 is a deficient number, since it is larger than the sum of its proper divisors (1).

131766601 is an equidigital number, since it uses as much as digits as its factorization.

131766601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 131766601 is about 11478.9634113887. The cubic root of 131766601 is about 508.8640628288.

The spelling of 131766601 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, six hundred one".