123672643 has 2 divisors, whose sum is σ = 123672644. Its totient is φ = 123672642.

The previous prime is 123672641. The next prime is 123672667. The reversal of 123672643 is 346276321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123672643 - 2¹ = 123672641 is a prime.

Together with 123672641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123672599 and 123672608.

It is not a weakly prime, because it can be changed into another prime (123672641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61836321 + 61836322.

It is an arithmetic number, because the mean of its divisors is an integer number (61836322).

Almost surely, 2^123672643 is an apocalyptic number.

123672643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123672643 is an equidigital number, since it uses as much as digits as its factorization.

123672643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 34.

The square root of 123672643 is about 11120.8202485248. The cubic root of 123672643 is about 498.2238889966.

The spelling of 123672643 in words is "one hundred twenty-three million, six hundred seventy-two thousand, six hundred forty-three".