131443969 has 2 divisors, whose sum is σ = 131443970. Its totient is φ = 131443968.

The previous prime is 131443951. The next prime is 131443987. The reversal of 131443969 is 969344131.

It is a balanced prime because it is at equal distance from previous prime (131443951) and next prime (131443987).

It can be written as a sum of positive squares in only one way, i.e., 67043344 + 64400625 = 8188^2 + 8025^2 .

It is a cyclic number.

It is not a de Polignac number, because 131443969 - 2¹⁹ = 130919681 is a prime.

It is a super-2 number, since 2×131443969² = 34555033972945922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131443469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65721984 + 65721985.

It is an arithmetic number, because the mean of its divisors is an integer number (65721985).

Almost surely, 2^131443969 is an apocalyptic number.

It is an amenable number.

131443969 is a deficient number, since it is larger than the sum of its proper divisors (1).

131443969 is an equidigital number, since it uses as much as digits as its factorization.

131443969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 131443969 is about 11464.9016131845. The cubic root of 131443969 is about 508.4484036073.

The spelling of 131443969 in words is "one hundred thirty-one million, four hundred forty-three thousand, nine hundred sixty-nine".