431240129 has 2 divisors, whose sum is σ = 431240130. Its totient is φ = 431240128.

The previous prime is 431240113. The next prime is 431240153. The reversal of 431240129 is 921042134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424360000 + 6880129 = 20600^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 431240129 - 2⁴ = 431240113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 431240098 and 431240107.

It is not a weakly prime, because it can be changed into another prime (431240629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215620064 + 215620065.

It is an arithmetic number, because the mean of its divisors is an integer number (215620065).

Almost surely, 2^431240129 is an apocalyptic number.

It is an amenable number.

431240129 is a deficient number, since it is larger than the sum of its proper divisors (1).

431240129 is an equidigital number, since it uses as much as digits as its factorization.

431240129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 431240129 is about 20766.3219901840. The cubic root of 431240129 is about 755.5091394985.

The spelling of 431240129 in words is "four hundred thirty-one million, two hundred forty thousand, one hundred twenty-nine".