1217169090 has 24 divisors (see below), whose sum is σ = 3164639868. Its totient is φ = 324578400.

The previous prime is 1217169067. The next prime is 1217169139. The reversal of 1217169090 is 909617121.

It can be written as a sum of positive squares in 2 ways, for example, as 1169434809 + 47734281 = 34197^2 + 6909^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6761961 + ... + 6762140.

Almost surely, 2^1217169090 is an apocalyptic number.

1217169090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217169090 is an abundant number, since it is smaller than the sum of its proper divisors (1947470778).

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

1217169090 is a wasteful number, since it uses less digits than its factorization.

1217169090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13524114 (or 13524111 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 1217169090 is about 34887.9504987037. The cubic root of 1217169090 is about 1067.7026115135.

The spelling of 1217169090 in words is "one billion, two hundred seventeen million, one hundred sixty-nine thousand, ninety".