163236493 has 6 divisors (see below), whose sum is σ = 189887406. Its totient is φ = 139916952.

The previous prime is 163236461. The next prime is 163236517. The reversal of 163236493 is 394632361.

It can be written as a sum of positive squares in only one way, i.e., 104591529 + 58644964 = 10227^2 + 7658^2 .

It is not a de Polignac number, because 163236493 - 2⁵ = 163236461 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 (163236433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1665630 + ... + 1665727.

It is an arithmetic number, because the mean of its divisors is an integer number (31647901).

Almost surely, 2^163236493 is an apocalyptic number.

It is an amenable number.

163236493 is a deficient number, since it is larger than the sum of its proper divisors (26650913).

163236493 is an equidigital number, since it uses as much as digits as its factorization.

163236493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331371 (or 3331364 counting only the distinct ones).

The product of its digits is 69984, while the sum is 37.

The square root of 163236493 is about 12776.4037584917. The cubic root of 163236493 is about 546.5196127279.

The spelling of 163236493 in words is "one hundred sixty-three million, two hundred thirty-six thousand, four hundred ninety-three".