2139418673 has 4 divisors (see below), whose sum is σ = 2445049920. Its totient is φ = 1833787428.

The previous prime is 2139418667. The next prime is 2139418691. The reversal of 2139418673 is 3768149312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2139418673 - 2¹⁴ = 2139402289 is a prime.

It is a super-2 number, since 2×2139418673² = 9154224516762161858, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2139418643) 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, 152815613 + ... + 152815626.

It is an arithmetic number, because the mean of its divisors is an integer number (611262480).

Almost surely, 2^2139418673 is an apocalyptic number.

It is an amenable number.

2139418673 is a deficient number, since it is larger than the sum of its proper divisors (305631247).

2139418673 is an equidigital number, since it uses as much as digits as its factorization.

2139418673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305631246.

The product of its digits is 217728, while the sum is 44.

The square root of 2139418673 is about 46253.8503586458. The cubic root of 2139418673 is about 1288.5420447283.

The spelling of 2139418673 in words is "two billion, one hundred thirty-nine million, four hundred eighteen thousand, six hundred seventy-three".