163897466 has 4 divisors (see below), whose sum is σ = 245846202. Its totient is φ = 81948732.

The previous prime is 163897463. The next prime is 163897529. The reversal of 163897466 is 664798361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 664798361 = 43 ⋅15460427.

It can be written as a sum of positive squares in only one way, i.e., 89851441 + 74046025 = 9479^2 + 8605^2 .

It is a super-2 number, since 2×163897466² = 53724758722442312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163897463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40974365 + ... + 40974368.

Almost surely, 2^163897466 is an apocalyptic number.

163897466 is a deficient number, since it is larger than the sum of its proper divisors (81948736).

163897466 is an equidigital number, since it uses as much as digits as its factorization.

163897466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81948735.

The product of its digits is 1306368, while the sum is 50.

The square root of 163897466 is about 12802.2445688246. The cubic root of 163897466 is about 547.2562703788.

The spelling of 163897466 in words is "one hundred sixty-three million, eight hundred ninety-seven thousand, four hundred sixty-six".