131700409 has 2 divisors, whose sum is σ = 131700410. Its totient is φ = 131700408.

The previous prime is 131700407. The next prime is 131700463. The reversal of 131700409 is 904007131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123832384 + 7868025 = 11128^2 + 2805^2 .

It is an emirp because it is prime and its reverse (904007131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131700409 - 2¹ = 131700407 is a prime.

Together with 131700407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131700407) 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, 65850204 + 65850205.

It is an arithmetic number, because the mean of its divisors is an integer number (65850205).

Almost surely, 2^131700409 is an apocalyptic number.

It is an amenable number.

131700409 is a deficient number, since it is larger than the sum of its proper divisors (1).

131700409 is an equidigital number, since it uses as much as digits as its factorization.

131700409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 131700409 is about 11476.0798620435. The cubic root of 131700409 is about 508.7788404951.

The spelling of 131700409 in words is "one hundred thirty-one million, seven hundred thousand, four hundred nine".