2189740057 has 2 divisors, whose sum is σ = 2189740058. Its totient is φ = 2189740056.

The previous prime is 2189740051. The next prime is 2189740129. The reversal of 2189740057 is 7500479812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1709078281 + 480661776 = 41341^2 + 21924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189740057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2189739995 and 2189740022.

It is not a weakly prime, because it can be changed into another prime (2189740051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094870028 + 1094870029.

It is an arithmetic number, because the mean of its divisors is an integer number (1094870029).

Almost surely, 2^2189740057 is an apocalyptic number.

It is an amenable number.

2189740057 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189740057 is an equidigital number, since it uses as much as digits as its factorization.

2189740057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 2189740057 is about 46794.6584237988. The cubic root of 2189740057 is about 1298.5664784039.

The spelling of 2189740057 in words is "two billion, one hundred eighty-nine million, seven hundred forty thousand, fifty-seven".