19798159 has 2 divisors, whose sum is σ = 19798160. Its totient is φ = 19798158.

The previous prime is 19798153. The next prime is 19798201. The reversal of 19798159 is 95189791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19798159 - 2²³ = 11409551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19798153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9899079 + 9899080.

It is an arithmetic number, because the mean of its divisors is an integer number (9899080).

Almost surely, 2^19798159 is an apocalyptic number.

19798159 is a deficient number, since it is larger than the sum of its proper divisors (1).

19798159 is an equidigital number, since it uses as much as digits as its factorization.

19798159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 49.

The square root of 19798159 is about 4449.5122204574. The cubic root of 19798159 is about 270.5255379098.

The spelling of 19798159 in words is "nineteen million, seven hundred ninety-eight thousand, one hundred fifty-nine".