19416997 has 2 divisors, whose sum is σ = 19416998. Its totient is φ = 19416996.

The previous prime is 19416989. The next prime is 19417003. The reversal of 19416997 is 79961491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 7403841 = 3466^2 + 2721^2 .

It is an emirp because it is prime and its reverse (79961491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19416997 - 2³ = 19416989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19416967) 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, 9708498 + 9708499.

It is an arithmetic number, because the mean of its divisors is an integer number (9708499).

Almost surely, 2^19416997 is an apocalyptic number.

It is an amenable number.

19416997 is a deficient number, since it is larger than the sum of its proper divisors (1).

19416997 is an equidigital number, since it uses as much as digits as its factorization.

19416997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 19416997 is about 4406.4721717038. The cubic root of 19416997 is about 268.7781876330.

The spelling of 19416997 in words is "nineteen million, four hundred sixteen thousand, nine hundred ninety-seven".