19123969 has 2 divisors, whose sum is σ = 19123970. Its totient is φ = 19123968.

The previous prime is 19123919. The next prime is 19123991. The reversal of 19123969 is 96932191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 288369 = 4340^2 + 537^2 .

It is a cyclic number.

It is not a de Polignac number, because 19123969 - 2¹⁵ = 19091201 is a prime.

It is a super-2 number, since 2×19123969² = 731452380625922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19123919) 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, 9561984 + 9561985.

It is an arithmetic number, because the mean of its divisors is an integer number (9561985).

Almost surely, 2^19123969 is an apocalyptic number.

It is an amenable number.

19123969 is a deficient number, since it is larger than the sum of its proper divisors (1).

19123969 is an equidigital number, since it uses as much as digits as its factorization.

19123969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 19123969 is about 4373.0960428511. The cubic root of 19123969 is about 267.4192564992.

The spelling of 19123969 in words is "nineteen million, one hundred twenty-three thousand, nine hundred sixty-nine".