19965097 has 2 divisors, whose sum is σ = 19965098. Its totient is φ = 19965096.

The previous prime is 19965091. The next prime is 19965107. The reversal of 19965097 is 79056991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13957696 + 6007401 = 3736^2 + 2451^2 .

It is a cyclic number.

It is not a de Polignac number, because 19965097 - 2⁷ = 19964969 is a prime.

It is not a weakly prime, because it can be changed into another prime (19965091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9982548 + 9982549.

It is an arithmetic number, because the mean of its divisors is an integer number (9982549).

Almost surely, 2^19965097 is an apocalyptic number.

It is an amenable number.

19965097 is a deficient number, since it is larger than the sum of its proper divisors (1).

19965097 is an equidigital number, since it uses as much as digits as its factorization.

19965097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 19965097 is about 4468.2319769681. The cubic root of 19965097 is about 271.2837675192.

The spelling of 19965097 in words is "nineteen million, nine hundred sixty-five thousand, ninety-seven".