1831317149 has 2 divisors, whose sum is σ = 1831317150. Its totient is φ = 1831317148.

The previous prime is 1831317121. The next prime is 1831317167. The reversal of 1831317149 is 9417131381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1538051524 + 293265625 = 39218^2 + 17125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1831317149 - 2¹⁶ = 1831251613 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 (1831317119) 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, 915658574 + 915658575.

It is an arithmetic number, because the mean of its divisors is an integer number (915658575).

Almost surely, 2^1831317149 is an apocalyptic number.

It is an amenable number.

1831317149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1831317149 is an equidigital number, since it uses as much as digits as its factorization.

1831317149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 1831317149 is about 42793.8914916603. The cubic root of 1831317149 is about 1223.4545885216.

The spelling of 1831317149 in words is "one billion, eight hundred thirty-one million, three hundred seventeen thousand, one hundred forty-nine".