2139263461 has 2 divisors, whose sum is σ = 2139263462. Its totient is φ = 2139263460.

The previous prime is 2139263449. The next prime is 2139263501. The reversal of 2139263461 is 1643629312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2078812836 + 60450625 = 45594^2 + 7775^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139263461 - 2¹³ = 2139255269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2139263461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2139263761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069631730 + 1069631731.

It is an arithmetic number, because the mean of its divisors is an integer number (1069631731).

Almost surely, 2^2139263461 is an apocalyptic number.

It is an amenable number.

2139263461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139263461 is an equidigital number, since it uses as much as digits as its factorization.

2139263461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 2139263461 is about 46252.1725003269. The cubic root of 2139263461 is about 1288.5108833000.

The spelling of 2139263461 in words is "two billion, one hundred thirty-nine million, two hundred sixty-three thousand, four hundred sixty-one".