2117738473 has 2 divisors, whose sum is σ = 2117738474. Its totient is φ = 2117738472.

The previous prime is 2117738431. The next prime is 2117738477. The reversal of 2117738473 is 3748377112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918702809 + 199035664 = 43803^2 + 14108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117738473 - 2⁹ = 2117737961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2117738477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058869236 + 1058869237.

It is an arithmetic number, because the mean of its divisors is an integer number (1058869237).

Almost surely, 2^2117738473 is an apocalyptic number.

It is an amenable number.

2117738473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117738473 is an equidigital number, since it uses as much as digits as its factorization.

2117738473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 43.

The square root of 2117738473 is about 46018.8925659886. The cubic root of 2117738473 is about 1284.1746981448.

The spelling of 2117738473 in words is "two billion, one hundred seventeen million, seven hundred thirty-eight thousand, four hundred seventy-three".