123664603 has 4 divisors (see below), whose sum is σ = 126540568. Its totient is φ = 120788640.

The previous prime is 123664589. The next prime is 123664609. The reversal of 123664603 is 306466321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123664603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123664609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437918 + ... + 1438003.

It is an arithmetic number, because the mean of its divisors is an integer number (31635142).

Almost surely, 2^123664603 is an apocalyptic number.

123664603 is a deficient number, since it is larger than the sum of its proper divisors (2875965).

123664603 is an equidigital number, since it uses as much as digits as its factorization.

123664603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875964.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 123664603 is about 11120.4587585225. The cubic root of 123664603 is about 498.2130921952.

The spelling of 123664603 in words is "one hundred twenty-three million, six hundred sixty-four thousand, six hundred three".