163138798 has 4 divisors (see below), whose sum is σ = 244708200. Its totient is φ = 81569398.

The previous prime is 163138757. The next prime is 163138819. The reversal of 163138798 is 897831361.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×163138798² = 53228534825769608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40784698 + ... + 40784701.

It is an arithmetic number, because the mean of its divisors is an integer number (61177050).

Almost surely, 2^163138798 is an apocalyptic number.

163138798 is a deficient number, since it is larger than the sum of its proper divisors (81569402).

163138798 is an equidigital number, since it uses as much as digits as its factorization.

163138798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81569401.

The product of its digits is 217728, while the sum is 46.

The square root of 163138798 is about 12772.5799273287. The cubic root of 163138798 is about 546.4105625851.

The spelling of 163138798 in words is "one hundred sixty-three million, one hundred thirty-eight thousand, seven hundred ninety-eight".