2140636493 has 2 divisors, whose sum is σ = 2140636494. Its totient is φ = 2140636492.

The previous prime is 2140636471. The next prime is 2140636513. The reversal of 2140636493 is 3946360412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1650146884 + 490489609 = 40622^2 + 22147^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140636493 - 2⁶ = 2140636429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2140636403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070318246 + 1070318247.

It is an arithmetic number, because the mean of its divisors is an integer number (1070318247).

Almost surely, 2^2140636493 is an apocalyptic number.

It is an amenable number.

2140636493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140636493 is an equidigital number, since it uses as much as digits as its factorization.

2140636493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 2140636493 is about 46267.0130114318. The cubic root of 2140636493 is about 1288.7864903558.

The spelling of 2140636493 in words is "two billion, one hundred forty million, six hundred thirty-six thousand, four hundred ninety-three".