2138789461 has 2 divisors, whose sum is σ = 2138789462. Its totient is φ = 2138789460.

The previous prime is 2138789453. The next prime is 2138789537. The reversal of 2138789461 is 1649878312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1959390225 + 179399236 = 44265^2 + 13394^2 .

It is a cyclic number.

It is not a de Polignac number, because 2138789461 - 2³ = 2138789453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138189461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069394730 + 1069394731.

It is an arithmetic number, because the mean of its divisors is an integer number (1069394731).

Almost surely, 2^2138789461 is an apocalyptic number.

It is an amenable number.

2138789461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138789461 is an equidigital number, since it uses as much as digits as its factorization.

2138789461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 2138789461 is about 46247.0481328268. The cubic root of 2138789461 is about 1288.4157104701.

The spelling of 2138789461 in words is "two billion, one hundred thirty-eight million, seven hundred eighty-nine thousand, four hundred sixty-one".