1899739423 has 2 divisors, whose sum is σ = 1899739424. Its totient is φ = 1899739422.

The previous prime is 1899739417. The next prime is 1899739547. The reversal of 1899739423 is 3249379981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1899739423 - 2²⁹ = 1362868511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1899739823) 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, 949869711 + 949869712.

It is an arithmetic number, because the mean of its divisors is an integer number (949869712).

Almost surely, 2^1899739423 is an apocalyptic number.

1899739423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899739423 is an equidigital number, since it uses as much as digits as its factorization.

1899739423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 1899739423 is about 43586.0003097325. Note that the first 3 decimals coincide. The cubic root of 1899739423 is about 1238.5057058387.

It can be divided in two parts, 189973 and 9423, that added together give a triangular number (199396 = T₆₃₁).

The spelling of 1899739423 in words is "one billion, eight hundred ninety-nine million, seven hundred thirty-nine thousand, four hundred twenty-three".