19368997 has 2 divisors, whose sum is σ = 19368998. Its totient is φ = 19368996.

The previous prime is 19368959. The next prime is 19369003. The reversal of 19368997 is 79986391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19368801 + 196 = 4401^2 + 14^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19368997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19368197) 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, 9684498 + 9684499.

It is an arithmetic number, because the mean of its divisors is an integer number (9684499).

Almost surely, 2^19368997 is an apocalyptic number.

It is an amenable number.

19368997 is a deficient number, since it is larger than the sum of its proper divisors (1).

19368997 is an equidigital number, since it uses as much as digits as its factorization.

19368997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 52.

The square root of 19368997 is about 4401.0222676101. The cubic root of 19368997 is about 268.5565261919.

The spelling of 19368997 in words is "nineteen million, three hundred sixty-eight thousand, nine hundred ninety-seven".