163773457 has 4 divisors (see below), whose sum is σ = 163997620. Its totient is φ = 163549296.

The previous prime is 163773443. The next prime is 163773473. The reversal of 163773457 is 754377361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754377361 = 14159 ⋅53279.

It can be written as a sum of positive squares in 2 ways, for example, as 104775696 + 58997761 = 10236^2 + 7681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163773457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163773437) 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, 110982 + ... + 112447.

It is an arithmetic number, because the mean of its divisors is an integer number (40999405).

Almost surely, 2^163773457 is an apocalyptic number.

It is an amenable number.

163773457 is a deficient number, since it is larger than the sum of its proper divisors (224163).

163773457 is an equidigital number, since it uses as much as digits as its factorization.

163773457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224162.

The product of its digits is 370440, while the sum is 43.

The square root of 163773457 is about 12797.4004000813. The cubic root of 163773457 is about 547.1182128730.

The spelling of 163773457 in words is "one hundred sixty-three million, seven hundred seventy-three thousand, four hundred fifty-seven".