163798139 has 2 divisors, whose sum is σ = 163798140. Its totient is φ = 163798138.

The previous prime is 163798121. The next prime is 163798147. The reversal of 163798139 is 931897361.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (931897361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163798139 - 2⁸ = 163797883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163798093 and 163798102.

It is not a weakly prime, because it can be changed into another prime (163798169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81899069 + 81899070.

It is an arithmetic number, because the mean of its divisors is an integer number (81899070).

Almost surely, 2^163798139 is an apocalyptic number.

163798139 is a deficient number, since it is larger than the sum of its proper divisors (1).

163798139 is an equidigital number, since it uses as much as digits as its factorization.

163798139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 163798139 is about 12798.3647002264. The cubic root of 163798139 is about 547.1456965561.

The spelling of 163798139 in words is "one hundred sixty-three million, seven hundred ninety-eight thousand, one hundred thirty-nine".