1217116937 has 4 divisors (see below), whose sum is σ = 1221448596. Its totient is φ = 1212785280.

The previous prime is 1217116931. The next prime is 1217116949. The reversal of 1217116937 is 7396117121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7396117121 = 17 ⋅435065713.

It can be written as a sum of positive squares in 2 ways, for example, as 438651136 + 778465801 = 20944^2 + 27901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217116937 - 2¹⁴ = 1217100553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217116937.

It is not an unprimeable number, because it can be changed into a prime (1217116931) 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, 2165408 + ... + 2165969.

It is an arithmetic number, because the mean of its divisors is an integer number (305362149).

Almost surely, 2^1217116937 is an apocalyptic number.

It is an amenable number.

1217116937 is a deficient number, since it is larger than the sum of its proper divisors (4331659).

1217116937 is an equidigital number, since it uses as much as digits as its factorization.

1217116937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331658.

The product of its digits is 15876, while the sum is 38.

The square root of 1217116937 is about 34887.2030549885. The cubic root of 1217116937 is about 1067.6873617315.

The spelling of 1217116937 in words is "one billion, two hundred seventeen million, one hundred sixteen thousand, nine hundred thirty-seven".