19149943 has 2 divisors, whose sum is σ = 19149944. Its totient is φ = 19149942.

The previous prime is 19149931. The next prime is 19149953. The reversal of 19149943 is 34994191.

It is a strong prime.

It is an emirp because it is prime and its reverse (34994191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19149943 - 2¹⁷ = 19018871 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19149896 and 19149905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19149953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9574971 + 9574972.

It is an arithmetic number, because the mean of its divisors is an integer number (9574972).

Almost surely, 2^19149943 is an apocalyptic number.

19149943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19149943 is an equidigital number, since it uses as much as digits as its factorization.

19149943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 19149943 is about 4376.0647847124. The cubic root of 19149943 is about 267.5402705261.

The spelling of 19149943 in words is "nineteen million, one hundred forty-nine thousand, nine hundred forty-three".