123420497 has 4 divisors (see below), whose sum is σ = 123629220. Its totient is φ = 123211776.

The previous prime is 123420487. The next prime is 123420509. The reversal of 123420497 is 794024321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31854736 + 91565761 = 5644^2 + 9569^2 .

It is a cyclic number.

It is not a de Polignac number, because 123420497 - 2⁴ = 123420481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123420487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103472 + ... + 104657.

It is an arithmetic number, because the mean of its divisors is an integer number (30907305).

Almost surely, 2^123420497 is an apocalyptic number.

It is an amenable number.

123420497 is a deficient number, since it is larger than the sum of its proper divisors (208723).

123420497 is an equidigital number, since it uses as much as digits as its factorization.

123420497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208722.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 123420497 is about 11109.4778005089. The cubic root of 123420497 is about 497.8850626938.

The spelling of 123420497 in words is "one hundred twenty-three million, four hundred twenty thousand, four hundred ninety-seven".