133879645 has 4 divisors (see below), whose sum is σ = 160655580. Its totient is φ = 107103712.

The previous prime is 133879633. The next prime is 133879667. The reversal of 133879645 is 546978331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546978331 = 2879 ⋅189989.

It can be written as a sum of positive squares in 2 ways, for example, as 83795716 + 50083929 = 9154^2 + 7077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133879645 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133879595 and 133879604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13387960 + ... + 13387969.

It is an arithmetic number, because the mean of its divisors is an integer number (40163895).

Almost surely, 2^133879645 is an apocalyptic number.

It is an amenable number.

133879645 is a deficient number, since it is larger than the sum of its proper divisors (26775935).

133879645 is an equidigital number, since it uses as much as digits as its factorization.

133879645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26775934.

The product of its digits is 544320, while the sum is 46.

The square root of 133879645 is about 11570.6371907514. The cubic root of 133879645 is about 511.5697437727.

It can be divided in two parts, 13387 and 9645, that added together give a palindrome (23032).

The spelling of 133879645 in words is "one hundred thirty-three million, eight hundred seventy-nine thousand, six hundred forty-five".