131905001 has 2 divisors, whose sum is σ = 131905002. Its totient is φ = 131905000.

The previous prime is 131904991. The next prime is 131905027. The reversal of 131905001 is 100509131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76387600 + 55517401 = 8740^2 + 7451^2 .

It is a cyclic number.

It is not a de Polignac number, because 131905001 - 2⁶ = 131904937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131905051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65952500 + 65952501.

It is an arithmetic number, because the mean of its divisors is an integer number (65952501).

Almost surely, 2^131905001 is an apocalyptic number.

It is an amenable number.

131905001 is a deficient number, since it is larger than the sum of its proper divisors (1).

131905001 is an equidigital number, since it uses as much as digits as its factorization.

131905001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 131905001 is about 11484.9902481456. The cubic root of 131905001 is about 509.0421609273.

The spelling of 131905001 in words is "one hundred thirty-one million, nine hundred five thousand, one".