1209849167 has 2 divisors, whose sum is σ = 1209849168. Its totient is φ = 1209849166.

The previous prime is 1209849139. The next prime is 1209849169. The reversal of 1209849167 is 7619489021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1209849167 - 2¹² = 1209845071 is a prime.

Together with 1209849169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209849169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604924583 + 604924584.

It is an arithmetic number, because the mean of its divisors is an integer number (604924584).

Almost surely, 2^1209849167 is an apocalyptic number.

1209849167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209849167 is an equidigital number, since it uses as much as digits as its factorization.

1209849167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1209849167 is about 34782.8861223447. The cubic root of 1209849167 is about 1065.5579572456.

The spelling of 1209849167 in words is "one billion, two hundred nine million, eight hundred forty-nine thousand, one hundred sixty-seven".