19157 has 2 divisors, whose sum is σ = 19158. Its totient is φ = 19156.

The previous prime is 19141. The next prime is 19163. The reversal of 19157 is 75191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11236 + 7921 = 106^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 19157 - 2⁴ = 19141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9578 + 9579.

It is an arithmetic number, because the mean of its divisors is an integer number (9579).

2¹⁹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

19157 is a deficient number, since it is larger than the sum of its proper divisors (1).

19157 is an equidigital number, since it uses as much as digits as its factorization.

19157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315, while the sum is 23.

The square root of 19157 is about 138.4088147482. The cubic root of 19157 is about 26.7573130499.

The spelling of 19157 in words is "nineteen thousand, one hundred fifty-seven".