19345897 has 2 divisors, whose sum is σ = 19345898. Its totient is φ = 19345896.

The previous prime is 19345873. The next prime is 19345943. The reversal of 19345897 is 79854391.

It is a happy number.

It is an a-pointer prime, because the next prime (19345943) can be obtained adding 19345897 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 301401 = 4364^2 + 549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19345897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19345397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9672948 + 9672949.

It is an arithmetic number, because the mean of its divisors is an integer number (9672949).

Almost surely, 2^19345897 is an apocalyptic number.

It is an amenable number.

19345897 is a deficient number, since it is larger than the sum of its proper divisors (1).

19345897 is an equidigital number, since it uses as much as digits as its factorization.

19345897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 19345897 is about 4398.3970943970. The cubic root of 19345897 is about 268.4497210812.

The spelling of 19345897 in words is "nineteen million, three hundred forty-five thousand, eight hundred ninety-seven".