131380409 has 2 divisors, whose sum is σ = 131380410. Its totient is φ = 131380408.

The previous prime is 131380373. The next prime is 131380489. The reversal of 131380409 is 904083131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122589184 + 8791225 = 11072^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 131380409 - 2¹⁶ = 131314873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131380489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65690204 + 65690205.

It is an arithmetic number, because the mean of its divisors is an integer number (65690205).

Almost surely, 2^131380409 is an apocalyptic number.

It is an amenable number.

131380409 is a deficient number, since it is larger than the sum of its proper divisors (1).

131380409 is an equidigital number, since it uses as much as digits as its factorization.

131380409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 131380409 is about 11462.1293396995. The cubic root of 131380409 is about 508.3664366391.

The spelling of 131380409 in words is "one hundred thirty-one million, three hundred eighty thousand, four hundred nine".