19412857 has 2 divisors, whose sum is σ = 19412858. Its totient is φ = 19412856.

The previous prime is 19412843. The next prime is 19412863. The reversal of 19412857 is 75821491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 1948816 = 4179^2 + 1396^2 .

It is an emirp because it is prime and its reverse (75821491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19412857 - 2²³ = 11024249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19412807) 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, 9706428 + 9706429.

It is an arithmetic number, because the mean of its divisors is an integer number (9706429).

Almost surely, 2^19412857 is an apocalyptic number.

It is an amenable number.

19412857 is a deficient number, since it is larger than the sum of its proper divisors (1).

19412857 is an equidigital number, since it uses as much as digits as its factorization.

19412857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 19412857 is about 4406.0023831133. The cubic root of 19412857 is about 268.7590837384.

The spelling of 19412857 in words is "nineteen million, four hundred twelve thousand, eight hundred fifty-seven".