431904149 has 2 divisors, whose sum is σ = 431904150. Its totient is φ = 431904148.

The previous prime is 431904113. The next prime is 431904167. The reversal of 431904149 is 941409134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292239025 + 139665124 = 17095^2 + 11818^2 .

It is a cyclic number.

It is not a de Polignac number, because 431904149 - 2⁸ = 431903893 is a prime.

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 (431904199) 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, 215952074 + 215952075.

It is an arithmetic number, because the mean of its divisors is an integer number (215952075).

Almost surely, 2^431904149 is an apocalyptic number.

It is an amenable number.

431904149 is a deficient number, since it is larger than the sum of its proper divisors (1).

431904149 is an equidigital number, since it uses as much as digits as its factorization.

431904149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 431904149 is about 20782.3037462164. The cubic root of 431904149 is about 755.8967162215.

The spelling of 431904149 in words is "four hundred thirty-one million, nine hundred four thousand, one hundred forty-nine".