19500097 has 2 divisors, whose sum is σ = 19500098. Its totient is φ = 19500096.

The previous prime is 19500083. The next prime is 19500101. The reversal of 19500097 is 79000591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9790641 + 9709456 = 3129^2 + 3116^2 .

It is an emirp because it is prime and its reverse (79000591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19500097 is a prime.

It is not a weakly prime, because it can be changed into another prime (19500017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9750048 + 9750049.

It is an arithmetic number, because the mean of its divisors is an integer number (9750049).

Almost surely, 2^19500097 is an apocalyptic number.

It is an amenable number.

19500097 is a deficient number, since it is larger than the sum of its proper divisors (1).

19500097 is an equidigital number, since it uses as much as digits as its factorization.

19500097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 19500097 is about 4415.8914162375. The cubic root of 19500097 is about 269.1610769042.

The spelling of 19500097 in words is "nineteen million, five hundred thousand, ninety-seven".