431671197949 has 2 divisors, whose sum is σ = 431671197950. Its totient is φ = 431671197948.

The previous prime is 431671197929. The next prime is 431671197973. The reversal of 431671197949 is 949791176134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423043574724 + 8627623225 = 650418^2 + 92885^2 .

It is a cyclic number.

It is not a de Polignac number, because 431671197949 - 2¹⁵ = 431671165181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431671197929) 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, 215835598974 + 215835598975.

It is an arithmetic number, because the mean of its divisors is an integer number (215835598975).

Almost surely, 2^431671197949 is an apocalyptic number.

It is an amenable number.

431671197949 is a deficient number, since it is larger than the sum of its proper divisors (1).

431671197949 is an equidigital number, since it uses as much as digits as its factorization.

431671197949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10287648, while the sum is 61.

The spelling of 431671197949 in words is "four hundred thirty-one billion, six hundred seventy-one million, one hundred ninety-seven thousand, nine hundred forty-nine".