2123194739 has 4 divisors (see below), whose sum is σ = 2123927520. Its totient is φ = 2122461960.

The previous prime is 2123194727. The next prime is 2123194741. The reversal of 2123194739 is 9374913212.

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 2123194739 - 2⁸ = 2123194483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123194696 and 2123194705.

It is not an unprimeable number, because it can be changed into a prime (2123194439) 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, 362027 + ... + 367844.

It is an arithmetic number, because the mean of its divisors is an integer number (530981880).

Almost surely, 2^2123194739 is an apocalyptic number.

2123194739 is a deficient number, since it is larger than the sum of its proper divisors (732781).

2123194739 is an equidigital number, since it uses as much as digits as its factorization.

2123194739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732780.

The product of its digits is 81648, while the sum is 41.

The square root of 2123194739 is about 46078.1373212937. The cubic root of 2123194739 is about 1285.2766267438.

The spelling of 2123194739 in words is "two billion, one hundred twenty-three million, one hundred ninety-four thousand, seven hundred thirty-nine".