431278454149 has 2 divisors, whose sum is σ = 431278454150. Its totient is φ = 431278454148.

The previous prime is 431278454147. The next prime is 431278454203. The reversal of 431278454149 is 941454872134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409075368100 + 22203086049 = 639590^2 + 149007^2 .

It is a cyclic number.

It is not a de Polignac number, because 431278454149 - 2¹ = 431278454147 is a prime.

It is a super-2 number, since 2×431278454149² (a number of 24 digits) contains 22 as substring.

Together with 431278454147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 431278454096 and 431278454105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431278454141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215639227074 + 215639227075.

It is an arithmetic number, because the mean of its divisors is an integer number (215639227075).

Almost surely, 2^431278454149 is an apocalyptic number.

It is an amenable number.

431278454149 is a deficient number, since it is larger than the sum of its proper divisors (1).

431278454149 is an equidigital number, since it uses as much as digits as its factorization.

431278454149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 52.

The spelling of 431278454149 in words is "four hundred thirty-one billion, two hundred seventy-eight million, four hundred fifty-four thousand, one hundred forty-nine".