169198019 has 2 divisors, whose sum is σ = 169198020. Its totient is φ = 169198018.

The previous prime is 169197961. The next prime is 169198027. The reversal of 169198019 is 910891961.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169198019 is a prime.

It is a super-2 number, since 2×169198019² = 57255939267048722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (169198319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84599009 + 84599010.

It is an arithmetic number, because the mean of its divisors is an integer number (84599010).

Almost surely, 2^169198019 is an apocalyptic number.

169198019 is a deficient number, since it is larger than the sum of its proper divisors (1).

169198019 is an equidigital number, since it uses as much as digits as its factorization.

169198019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 169198019 is about 13007.6138857209. The cubic root of 169198019 is about 553.0933344529.

The spelling of 169198019 in words is "one hundred sixty-nine million, one hundred ninety-eight thousand, nineteen".