123816454 has 4 divisors (see below), whose sum is σ = 185724684. Its totient is φ = 61908226.

The previous prime is 123816443. The next prime is 123816461. The reversal of 123816454 is 454618321.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×123816454² = 30661028562268232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30954112 + ... + 30954115.

It is an arithmetic number, because the mean of its divisors is an integer number (46431171).

Almost surely, 2^123816454 is an apocalyptic number.

123816454 is a deficient number, since it is larger than the sum of its proper divisors (61908230).

123816454 is an equidigital number, since it uses as much as digits as its factorization.

123816454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61908229.

The product of its digits is 23040, while the sum is 34.

The square root of 123816454 is about 11127.2842149376. The cubic root of 123816454 is about 498.4169317463.

The spelling of 123816454 in words is "one hundred twenty-three million, eight hundred sixteen thousand, four hundred fifty-four".