19141897 has 2 divisors, whose sum is σ = 19141898. Its totient is φ = 19141896.

The previous prime is 19141891. The next prime is 19141921. The reversal of 19141897 is 79814191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17007376 + 2134521 = 4124^2 + 1461^2 .

It is an emirp because it is prime and its reverse (79814191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19141897 - 2¹¹ = 19139849 is a prime.

It is not a weakly prime, because it can be changed into another prime (19141891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9570948 + 9570949.

It is an arithmetic number, because the mean of its divisors is an integer number (9570949).

Almost surely, 2^19141897 is an apocalyptic number.

It is an amenable number.

19141897 is a deficient number, since it is larger than the sum of its proper divisors (1).

19141897 is an equidigital number, since it uses as much as digits as its factorization.

19141897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 40.

The square root of 19141897 is about 4375.1453690135. The cubic root of 19141897 is about 267.5027955570.

The spelling of 19141897 in words is "nineteen million, one hundred forty-one thousand, eight hundred ninety-seven".