431205149 has 2 divisors, whose sum is σ = 431205150. Its totient is φ = 431205148.

The previous prime is 431205121. The next prime is 431205163. The reversal of 431205149 is 941502134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396607225 + 34597924 = 19915^2 + 5882^2 .

It is a cyclic number.

It is not a de Polignac number, because 431205149 - 2¹² = 431201053 is a prime.

It is a super-2 number, since 2×431205149² = 371875761048224402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431205349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215602574 + 215602575.

It is an arithmetic number, because the mean of its divisors is an integer number (215602575).

Almost surely, 2^431205149 is an apocalyptic number.

It is an amenable number.

431205149 is a deficient number, since it is larger than the sum of its proper divisors (1).

431205149 is an equidigital number, since it uses as much as digits as its factorization.

431205149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 431205149 is about 20765.4797440367. The cubic root of 431205149 is about 755.4887112633.

The spelling of 431205149 in words is "four hundred thirty-one million, two hundred five thousand, one hundred forty-nine".