19749343 has 2 divisors, whose sum is σ = 19749344. Its totient is φ = 19749342.

The previous prime is 19749329. The next prime is 19749391. The reversal of 19749343 is 34394791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19749343 - 2⁹ = 19748831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19749296 and 19749305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19749043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9874671 + 9874672.

It is an arithmetic number, because the mean of its divisors is an integer number (9874672).

Almost surely, 2^19749343 is an apocalyptic number.

19749343 is a deficient number, since it is larger than the sum of its proper divisors (1).

19749343 is an equidigital number, since it uses as much as digits as its factorization.

19749343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 19749343 is about 4444.0232897680. The cubic root of 19749343 is about 270.3030114370.

The spelling of 19749343 in words is "nineteen million, seven hundred forty-nine thousand, three hundred forty-three".