133105873 has 4 divisors (see below), whose sum is σ = 133129828. Its totient is φ = 133081920.

The previous prime is 133105871. The next prime is 133105879. The reversal of 133105873 is 378501331.

It is a happy number.

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 77035729 + 56070144 = 8777^2 + 7488^2 .

It is a cyclic number.

It is not a de Polignac number, because 133105873 - 2¹ = 133105871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133105871) 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, 1165 + ... + 16357.

It is an arithmetic number, because the mean of its divisors is an integer number (33282457).

Almost surely, 2^133105873 is an apocalyptic number.

It is an amenable number.

133105873 is a deficient number, since it is larger than the sum of its proper divisors (23955).

133105873 is an equidigital number, since it uses as much as digits as its factorization.

133105873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23954.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 133105873 is about 11537.1518582361. The cubic root of 133105873 is about 510.5822812429.

The spelling of 133105873 in words is "one hundred thirty-three million, one hundred five thousand, eight hundred seventy-three".