123997803 has 4 divisors (see below), whose sum is σ = 165330408. Its totient is φ = 82665200.

The previous prime is 123997759. The next prime is 123997829. The reversal of 123997803 is 308799321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308799321 = 3 ⋅102933107.

It is a cyclic number.

It is not a de Polignac number, because 123997803 - 2²⁴ = 107220587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123997843) 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, 20666298 + ... + 20666303.

It is an arithmetic number, because the mean of its divisors is an integer number (41332602).

Almost surely, 2^123997803 is an apocalyptic number.

123997803 is a deficient number, since it is larger than the sum of its proper divisors (41332605).

123997803 is an equidigital number, since it uses as much as digits as its factorization.

123997803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41332604.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 123997803 is about 11135.4300770109. The cubic root of 123997803 is about 498.6601501451.

It can be divided in two parts, 12399 and 7803, that added together give a palindrome (20202).

The spelling of 123997803 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, eight hundred three".