123209073 has 16 divisors (see below), whose sum is σ = 196573440. Its totient is φ = 75820752.

The previous prime is 123209071. The next prime is 123209083. The reversal of 123209073 is 370902321.

It is not a de Polignac number, because 123209073 - 2¹ = 123209071 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123209071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175161 + ... + 175862.

It is an arithmetic number, because the mean of its divisors is an integer number (12285840).

Almost surely, 2^123209073 is an apocalyptic number.

123209073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123209073 is a deficient number, since it is larger than the sum of its proper divisors (73364367).

123209073 is a wasteful number, since it uses less digits than its factorization.

123209073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351045 (or 351039 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 123209073 is about 11099.9582431647. The cubic root of 123209073 is about 497.6006015254.

The spelling of 123209073 in words is "one hundred twenty-three million, two hundred nine thousand, seventy-three".