123563773 has 4 divisors (see below), whose sum is σ = 124952220. Its totient is φ = 122175328.

The previous prime is 123563771. The next prime is 123563777. The reversal of 123563773 is 377365321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 377365321 = 307 ⋅1229203.

It can be written as a sum of positive squares in 2 ways, for example, as 8602489 + 114961284 = 2933^2 + 10722^2 .

It is a cyclic number.

It is not a de Polignac number, because 123563773 - 2¹ = 123563771 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 (123563771) 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, 694090 + ... + 694267.

It is an arithmetic number, because the mean of its divisors is an integer number (31238055).

Almost surely, 2^123563773 is an apocalyptic number.

It is an amenable number.

123563773 is a deficient number, since it is larger than the sum of its proper divisors (1388447).

123563773 is an equidigital number, since it uses as much as digits as its factorization.

123563773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388446.

The product of its digits is 79380, while the sum is 37.

The square root of 123563773 is about 11115.9242980510. The cubic root of 123563773 is about 498.0776492739.

It can be divided in two parts, 12356 and 3773, that added together give a square (16129 = 127²).

The spelling of 123563773 in words is "one hundred twenty-three million, five hundred sixty-three thousand, seven hundred seventy-three".