123732813 has 4 divisors (see below), whose sum is σ = 164977088. Its totient is φ = 82488540.

The previous prime is 123732787. The next prime is 123732841. The reversal of 123732813 is 318237321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 318237321 = 3 ⋅106079107.

It is not a de Polignac number, because 123732813 - 2²⁵ = 90178381 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 (123732863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20622133 + ... + 20622138.

It is an arithmetic number, because the mean of its divisors is an integer number (41244272).

Almost surely, 2^123732813 is an apocalyptic number.

It is an amenable number.

123732813 is a deficient number, since it is larger than the sum of its proper divisors (41244275).

123732813 is an equidigital number, since it uses as much as digits as its factorization.

123732813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41244274.

The product of its digits is 6048, while the sum is 30.

The square root of 123732813 is about 11123.5252056171. The cubic root of 123732813 is about 498.3046755803.

The spelling of 123732813 in words is "one hundred twenty-three million, seven hundred thirty-two thousand, eight hundred thirteen".