163420493 has 4 divisors (see below), whose sum is σ = 164596320. Its totient is φ = 162244668.

The previous prime is 163420489. The next prime is 163420519. The reversal of 163420493 is 394024361.

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 163420493 - 2² = 163420489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163420483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587705 + ... + 587982.

It is an arithmetic number, because the mean of its divisors is an integer number (41149080).

Almost surely, 2^163420493 is an apocalyptic number.

It is an amenable number.

163420493 is a deficient number, since it is larger than the sum of its proper divisors (1175827).

163420493 is a wasteful number, since it uses less digits than its factorization.

163420493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175826.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 163420493 is about 12783.6025047715. The cubic root of 163420493 is about 546.7248810618.

The spelling of 163420493 in words is "one hundred sixty-three million, four hundred twenty thousand, four hundred ninety-three".