2117940994 has 8 divisors (see below), whose sum is σ = 3421289340. Its totient is φ = 977511216.

The previous prime is 2117940991. The next prime is 2117940997. The reversal of 2117940994 is 4990497112.

It is an interprime number because it is at equal distance from previous prime (2117940991) and next prime (2117940997).

It can be written as a sum of positive squares in 2 ways, for example, as 2038071025 + 79869969 = 45145^2 + 8937^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2117940991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40729609 + ... + 40729660.

Almost surely, 2^2117940994 is an apocalyptic number.

2117940994 is a deficient number, since it is larger than the sum of its proper divisors (1303348346).

2117940994 is a wasteful number, since it uses less digits than its factorization.

2117940994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81459284.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 2117940994 is about 46021.0929248752. The cubic root of 2117940994 is about 1284.2156323863.

The spelling of 2117940994 in words is "two billion, one hundred seventeen million, nine hundred forty thousand, nine hundred ninety-four".