199996157 has 2 divisors, whose sum is σ = 199996158. Its totient is φ = 199996156.

The previous prime is 199996141. The next prime is 199996169. The reversal of 199996157 is 751699991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196588441 + 3407716 = 14021^2 + 1846^2 .

It is a cyclic number.

It is not a de Polignac number, because 199996157 - 2⁴ = 199996141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199996117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99998078 + 99998079.

It is an arithmetic number, because the mean of its divisors is an integer number (99998079).

Almost surely, 2^199996157 is an apocalyptic number.

It is an amenable number.

199996157 is a deficient number, since it is larger than the sum of its proper divisors (1).

199996157 is an equidigital number, since it uses as much as digits as its factorization.

199996157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 56.

The square root of 199996157 is about 14141.9997525103. Note that the first 3 decimals coincide. The cubic root of 199996157 is about 584.7998019519.

The spelling of 199996157 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, one hundred fifty-seven".