19499429 has 2 divisors, whose sum is σ = 19499430. Its totient is φ = 19499428.

The previous prime is 19499419. The next prime is 19499483. The reversal of 19499429 is 92499491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14615329 + 4884100 = 3823^2 + 2210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19499429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19499419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9749714 + 9749715.

It is an arithmetic number, because the mean of its divisors is an integer number (9749715).

Almost surely, 2^19499429 is an apocalyptic number.

It is an amenable number.

19499429 is a deficient number, since it is larger than the sum of its proper divisors (1).

19499429 is an equidigital number, since it uses as much as digits as its factorization.

19499429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 19499429 is about 4415.8157796720. The cubic root of 19499429 is about 269.1580033869.

The spelling of 19499429 in words is "nineteen million, four hundred ninety-nine thousand, four hundred twenty-nine".