123363581 has 4 divisors (see below), whose sum is σ = 134578464. Its totient is φ = 112148700.

The previous prime is 123363571. The next prime is 123363589. The reversal of 123363581 is 185363321.

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 123363581 - 2¹⁴ = 123347197 is a prime.

It is a super-2 number, since 2×123363581² = 30437146234287122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123363589) 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, 5607425 + ... + 5607446.

It is an arithmetic number, because the mean of its divisors is an integer number (33644616).

Almost surely, 2^123363581 is an apocalyptic number.

123363581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123363581 is a deficient number, since it is larger than the sum of its proper divisors (11214883).

123363581 is a wasteful number, since it uses less digits than its factorization.

123363581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11214882.

The product of its digits is 12960, while the sum is 32.

The square root of 123363581 is about 11106.9159085680. The cubic root of 123363581 is about 497.8085168362.

The spelling of 123363581 in words is "one hundred twenty-three million, three hundred sixty-three thousand, five hundred eighty-one".