131449001 has 2 divisors, whose sum is σ = 131449002. Its totient is φ = 131449000.

The previous prime is 131448997. The next prime is 131449027. The reversal of 131449001 is 100944131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 2399401 = 11360^2 + 1549^2 .

It is a cyclic number.

It is not a de Polignac number, because 131449001 - 2² = 131448997 is a prime.

It is not a weakly prime, because it can be changed into another prime (131449091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65724500 + 65724501.

It is an arithmetic number, because the mean of its divisors is an integer number (65724501).

Almost surely, 2^131449001 is an apocalyptic number.

It is an amenable number.

131449001 is a deficient number, since it is larger than the sum of its proper divisors (1).

131449001 is an equidigital number, since it uses as much as digits as its factorization.

131449001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 131449001 is about 11465.1210634690. The cubic root of 131449001 is about 508.4548917451.

The spelling of 131449001 in words is "one hundred thirty-one million, four hundred forty-nine thousand, one".