19239161 has 2 divisors, whose sum is σ = 19239162. Its totient is φ = 19239160.

The previous prime is 19239137. The next prime is 19239167. The reversal of 19239161 is 16193291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10118761 + 9120400 = 3181^2 + 3020^2 .

It is an emirp because it is prime and its reverse (16193291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19239161 - 2⁶ = 19239097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19239167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9619580 + 9619581.

It is an arithmetic number, because the mean of its divisors is an integer number (9619581).

Almost surely, 2^19239161 is an apocalyptic number.

It is an amenable number.

19239161 is a deficient number, since it is larger than the sum of its proper divisors (1).

19239161 is an equidigital number, since it uses as much as digits as its factorization.

19239161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 19239161 is about 4386.2468010818. The cubic root of 19239161 is about 267.9551096194.

The spelling of 19239161 in words is "nineteen million, two hundred thirty-nine thousand, one hundred sixty-one".