1217671311 has 4 divisors (see below), whose sum is σ = 1623561752. Its totient is φ = 811780872.

The previous prime is 1217671303. The next prime is 1217671339. The reversal of 1217671311 is 1131767121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1217671311 - 2³ = 1217671303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217679311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202945216 + ... + 202945221.

It is an arithmetic number, because the mean of its divisors is an integer number (405890438).

Almost surely, 2^1217671311 is an apocalyptic number.

1217671311 is a deficient number, since it is larger than the sum of its proper divisors (405890441).

1217671311 is an equidigital number, since it uses as much as digits as its factorization.

1217671311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405890440.

The product of its digits is 1764, while the sum is 30.

The square root of 1217671311 is about 34895.1473847009. The cubic root of 1217671311 is about 1067.8494410005.

The spelling of 1217671311 in words is "one billion, two hundred seventeen million, six hundred seventy-one thousand, three hundred eleven".