1217345307 has 8 divisors (see below), whose sum is σ = 1624444176. Its totient is φ = 810904992.

The previous prime is 1217345291. The next prime is 1217345321. The reversal of 1217345307 is 7035437121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1217345307 - 2⁴ = 1217345291 is a prime.

It is a super-3 number, since 3×1217345307³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1217365307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160308 + ... + 167729.

It is an arithmetic number, because the mean of its divisors is an integer number (203055522).

Almost surely, 2^1217345307 is an apocalyptic number.

1217345307 is a deficient number, since it is larger than the sum of its proper divisors (407098869).

1217345307 is a wasteful number, since it uses less digits than its factorization.

1217345307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329277.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 1217345307 is about 34890.4758780960. The cubic root of 1217345307 is about 1067.7541349689.

The spelling of 1217345307 in words is "one billion, two hundred seventeen million, three hundred forty-five thousand, three hundred seven".