4319940649 has 2 divisors, whose sum is σ = 4319940650. Its totient is φ = 4319940648.

The previous prime is 4319940629. The next prime is 4319940673. The reversal of 4319940649 is 9460499134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3798503424 + 521437225 = 61632^2 + 22835^2 .

It is a cyclic number.

It is not a de Polignac number, because 4319940649 - 2¹⁷ = 4319809577 is a prime.

It is not a weakly prime, because it can be changed into another prime (4319940629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2159970324 + 2159970325.

It is an arithmetic number, because the mean of its divisors is an integer number (2159970325).

Almost surely, 2^4319940649 is an apocalyptic number.

It is an amenable number.

4319940649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4319940649 is an equidigital number, since it uses as much as digits as its factorization.

4319940649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 4319940649 is about 65726.2554007149. The cubic root of 4319940649 is about 1628.6431114320.

The spelling of 4319940649 in words is "four billion, three hundred nineteen million, nine hundred forty thousand, six hundred forty-nine".