6131489209 has 2 divisors, whose sum is σ = 6131489210. Its totient is φ = 6131489208.

The previous prime is 6131489171. The next prime is 6131489291. The reversal of 6131489209 is 9029841316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5960612025 + 170877184 = 77205^2 + 13072^2 .

It is a cyclic number.

It is not a de Polignac number, because 6131489209 - 2⁹ = 6131488697 is a prime.

It is not a weakly prime, because it can be changed into another prime (6131487209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065744604 + 3065744605.

It is an arithmetic number, because the mean of its divisors is an integer number (3065744605).

Almost surely, 2^6131489209 is an apocalyptic number.

It is an amenable number.

6131489209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131489209 is an equidigital number, since it uses as much as digits as its factorization.

6131489209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 6131489209 is about 78303.8262730500. The cubic root of 6131489209 is about 1830.2987766028.

The spelling of 6131489209 in words is "six billion, one hundred thirty-one million, four hundred eighty-nine thousand, two hundred nine".