131368009 has 2 divisors, whose sum is σ = 131368010. Its totient is φ = 131368008.

The previous prime is 131367983. The next prime is 131368021. The reversal of 131368009 is 900863131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67815225 + 63552784 = 8235^2 + 7972^2 .

It is a cyclic number.

It is not a de Polignac number, because 131368009 - 2¹¹ = 131365961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131365009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65684004 + 65684005.

It is an arithmetic number, because the mean of its divisors is an integer number (65684005).

Almost surely, 2^131368009 is an apocalyptic number.

It is an amenable number.

131368009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131368009 is an equidigital number, since it uses as much as digits as its factorization.

131368009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 131368009 is about 11461.5884152241. The cubic root of 131368009 is about 508.3504425189.

The spelling of 131368009 in words is "one hundred thirty-one million, three hundred sixty-eight thousand, nine".