1217085697 has 16 divisors (see below), whose sum is σ = 1259665344. Its totient is φ = 1175200000.

The previous prime is 1217085677. The next prime is 1217085713. The reversal of 1217085697 is 7965807121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217085697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217085677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335797 + ... + 2336317.

It is an arithmetic number, because the mean of its divisors is an integer number (78729084).

Almost surely, 2^1217085697 is an apocalyptic number.

It is an amenable number.

1217085697 is a deficient number, since it is larger than the sum of its proper divisors (42579647).

1217085697 is a wasteful number, since it uses less digits than its factorization.

1217085697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 211680, while the sum is 46.

The square root of 1217085697 is about 34886.7553234748. The cubic root of 1217085697 is about 1067.6782268003.

The spelling of 1217085697 in words is "one billion, two hundred seventeen million, eighty-five thousand, six hundred ninety-seven".