163693489 has 4 divisors (see below), whose sum is σ = 164871280. Its totient is φ = 162515700.

The previous prime is 163693477. The next prime is 163693549. The reversal of 163693489 is 984396361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163693489 - 2²³ = 155304881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163493489) 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 in 3 ways as a sum of consecutive naturals, for example, 588687 + ... + 588964.

It is an arithmetic number, because the mean of its divisors is an integer number (41217820).

Almost surely, 2^163693489 is an apocalyptic number.

It is an amenable number.

163693489 is a deficient number, since it is larger than the sum of its proper divisors (1177791).

163693489 is a wasteful number, since it uses less digits than its factorization.

163693489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177790.

The product of its digits is 839808, while the sum is 49.

The square root of 163693489 is about 12794.2756340482. The cubic root of 163693489 is about 547.0291486394.

The spelling of 163693489 in words is "one hundred sixty-three million, six hundred ninety-three thousand, four hundred eighty-nine".