133678945 has 8 divisors (see below), whose sum is σ = 160503336. Its totient is φ = 106884096.

The previous prime is 133678943. The next prime is 133678957. The reversal of 133678945 is 549876331.

It can be written as a sum of positive squares in 4 ways, for example, as 21911761 + 111767184 = 4681^2 + 10572^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133678945 - 2¹ = 133678943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133678895 and 133678904.

It is not an unprimeable number, because it can be changed into a prime (133678943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4239 + ... + 16891.

It is an arithmetic number, because the mean of its divisors is an integer number (20062917).

Almost surely, 2^133678945 is an apocalyptic number.

It is an amenable number.

133678945 is a deficient number, since it is larger than the sum of its proper divisors (26824391).

133678945 is a wasteful number, since it uses less digits than its factorization.

133678945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771.

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

The square root of 133678945 is about 11561.9611225778. The cubic root of 133678945 is about 511.3139832205.

The spelling of 133678945 in words is "one hundred thirty-three million, six hundred seventy-eight thousand, nine hundred forty-five".