231243412420949 has 2 divisors, whose sum is σ = 231243412420950. Its totient is φ = 231243412420948.

The previous prime is 231243412420931. The next prime is 231243412421051. The reversal of 231243412420949 is 949024214342132.

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., 228707094994225 + 2536317426724 = 15123065^2 + 1592582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231243412420949 is a prime.

It is a super-2 number, since 2×231243412420949² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231243412420897 and 231243412420906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231243412420049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115621706210474 + 115621706210475.

It is an arithmetic number, because the mean of its divisors is an integer number (115621706210475).

Almost surely, 2^{231243412420949} is an apocalyptic number.

It is an amenable number.

231243412420949 is a deficient number, since it is larger than the sum of its proper divisors (1).

231243412420949 is an equidigital number, since it uses as much as digits as its factorization.

231243412420949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 50.

The spelling of 231243412420949 in words is "two hundred thirty-one trillion, two hundred forty-three billion, four hundred twelve million, four hundred twenty thousand, nine hundred forty-nine".