133198465 has 4 divisors (see below), whose sum is σ = 159838164. Its totient is φ = 106558768.

The previous prime is 133198447. The next prime is 133198511. The reversal of 133198465 is 564891331.

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 71842576 + 61355889 = 8476^2 + 7833^2 .

It is a cyclic number.

It is not a de Polignac number, because 133198465 - 2⁵ = 133198433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13319842 + ... + 13319851.

It is an arithmetic number, because the mean of its divisors is an integer number (39959541).

Almost surely, 2^133198465 is an apocalyptic number.

It is an amenable number.

133198465 is a deficient number, since it is larger than the sum of its proper divisors (26639699).

133198465 is an equidigital number, since it uses as much as digits as its factorization.

133198465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26639698.

The product of its digits is 77760, while the sum is 40.

The square root of 133198465 is about 11541.1639361028. The cubic root of 133198465 is about 510.7006453583.

The spelling of 133198465 in words is "one hundred thirty-three million, one hundred ninety-eight thousand, four hundred sixty-five".