123403051 has 4 divisors (see below), whose sum is σ = 130662072. Its totient is φ = 116144032.

The previous prime is 123403037. The next prime is 123403097. The reversal of 123403051 is 150304321.

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

It is a cyclic number.

It is not a de Polignac number, because 123403051 - 2¹⁷ = 123271979 is a prime.

It is a super-2 number, since 2×123403051² = 30456625992217202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123403031) 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, 3629485 + ... + 3629518.

It is an arithmetic number, because the mean of its divisors is an integer number (32665518).

Almost surely, 2^123403051 is an apocalyptic number.

123403051 is a deficient number, since it is larger than the sum of its proper divisors (7259021).

123403051 is an equidigital number, since it uses as much as digits as its factorization.

123403051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7259020.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 123403051 is about 11108.6925873390. The cubic root of 123403051 is about 497.8616022143.

Adding to 123403051 its reverse (150304321), we get a palindrome (273707372).

The spelling of 123403051 in words is "one hundred twenty-three million, four hundred three thousand, fifty-one".