1213079166 has 160 divisors (see below), whose sum is σ = 3202391808. Its totient is φ = 339655680.

The previous prime is 1213079159. The next prime is 1213079173. The reversal of 1213079166 is 6619703121.

1213079166 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1213079159) and next prime (1213079173).

It is a super-2 number, since 2×1213079166² = 2943122125966511112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213079166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1109316 + ... + 1110408.

Almost surely, 2^1213079166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213079166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1601195904).

1213079166 is an abundant number, since it is smaller than the sum of its proper divisors (1989312642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213079166 is a wasteful number, since it uses less digits than its factorization.

1213079166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1213079166 is about 34829.2860391941. The cubic root of 1213079166 is about 1066.5053736369.

The spelling of 1213079166 in words is "one billion, two hundred thirteen million, seventy-nine thousand, one hundred sixty-six".