133440123 has 32 divisors (see below), whose sum is σ = 194987520. Its totient is φ = 80847360.

The previous prime is 133440121. The next prime is 133440127. The reversal of 133440123 is 321044331.

It is not a de Polignac number, because 133440123 - 2¹ = 133440121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133440123.

It is not an unprimeable number, because it can be changed into a prime (133440121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183186 + ... + 183912.

It is an arithmetic number, because the mean of its divisors is an integer number (6093360).

Almost surely, 2^133440123 is an apocalyptic number.

133440123 is a deficient number, since it is larger than the sum of its proper divisors (61547397).

133440123 is a wasteful number, since it uses less digits than its factorization.

133440123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133440123 is about 11551.6285864808. The cubic root of 133440123 is about 511.0093084141.

Adding to 133440123 its reverse (321044331), we get a palindrome (454484454).

The spelling of 133440123 in words is "one hundred thirty-three million, four hundred forty thousand, one hundred twenty-three".