1217561167 has 2 divisors, whose sum is σ = 1217561168. Its totient is φ = 1217561166.

The previous prime is 1217561153. The next prime is 1217561221. The reversal of 1217561167 is 7611657121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1217561167 - 2¹⁵ = 1217528399 is a prime.

It is a super-3 number, since 3×1217561167³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217561467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608780583 + 608780584.

It is an arithmetic number, because the mean of its divisors is an integer number (608780584).

Almost surely, 2^1217561167 is an apocalyptic number.

1217561167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217561167 is an equidigital number, since it uses as much as digits as its factorization.

1217561167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 37.

The square root of 1217561167 is about 34893.5691353006. The cubic root of 1217561167 is about 1067.8172427232.

The spelling of 1217561167 in words is "one billion, two hundred seventeen million, five hundred sixty-one thousand, one hundred sixty-seven".