19469899 has 2 divisors, whose sum is σ = 19469900. Its totient is φ = 19469898.

The previous prime is 19469893. The next prime is 19469909. The reversal of 19469899 is 99896491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19469899 - 2⁵ = 19469867 is a prime.

It is not a weakly prime, because it can be changed into another prime (19469893) 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, 9734949 + 9734950.

It is an arithmetic number, because the mean of its divisors is an integer number (9734950).

Almost surely, 2^19469899 is an apocalyptic number.

19469899 is a deficient number, since it is larger than the sum of its proper divisors (1).

19469899 is an equidigital number, since it uses as much as digits as its factorization.

19469899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 55.

The square root of 19469899 is about 4412.4708497621. The cubic root of 19469899 is about 269.0220634833.

The spelling of 19469899 in words is "nineteen million, four hundred sixty-nine thousand, eight hundred ninety-nine".