2164512739 has 4 divisors (see below), whose sum is σ = 2205352656. Its totient is φ = 2123672824.

The previous prime is 2164512683. The next prime is 2164512751. The reversal of 2164512739 is 9372154612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2164512739 - 2¹⁵ = 2164479971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164512769) 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, 20419879 + ... + 20419984.

It is an arithmetic number, because the mean of its divisors is an integer number (551338164).

Almost surely, 2^2164512739 is an apocalyptic number.

2164512739 is a deficient number, since it is larger than the sum of its proper divisors (40839917).

2164512739 is an equidigital number, since it uses as much as digits as its factorization.

2164512739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40839916.

The product of its digits is 90720, while the sum is 40.

The square root of 2164512739 is about 46524.3241648925. The cubic root of 2164512739 is about 1293.5604101780.

The spelling of 2164512739 in words is "two billion, one hundred sixty-four million, five hundred twelve thousand, seven hundred thirty-nine".