2197939123 has 2 divisors, whose sum is σ = 2197939124. Its totient is φ = 2197939122.

The previous prime is 2197939021. The next prime is 2197939151. The reversal of 2197939123 is 3219397912.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197939123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197939423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098969561 + 1098969562.

It is an arithmetic number, because the mean of its divisors is an integer number (1098969562).

Almost surely, 2^2197939123 is an apocalyptic number.

2197939123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197939123 is an equidigital number, since it uses as much as digits as its factorization.

2197939123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 2197939123 is about 46882.1834282492. The cubic root of 2197939123 is about 1300.1852049744.

The spelling of 2197939123 in words is "two billion, one hundred ninety-seven million, nine hundred thirty-nine thousand, one hundred twenty-three".