75378133 has 4 divisors (see below), whose sum is σ = 75402220. Its totient is φ = 75354048.

The previous prime is 75378113. The next prime is 75378157. The reversal of 75378133 is 33187357.

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 41190724 + 34187409 = 6418^2 + 5847^2 .

It is a cyclic number.

It is not a de Polignac number, because 75378133 - 2⁵ = 75378101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75378092 and 75378101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75378103) 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, 6498 + ... + 13891.

It is an arithmetic number, because the mean of its divisors is an integer number (18850555).

Almost surely, 2^75378133 is an apocalyptic number.

It is an amenable number.

75378133 is a deficient number, since it is larger than the sum of its proper divisors (24087).

75378133 is a wasteful number, since it uses less digits than its factorization.

75378133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24086.

The product of its digits is 52920, while the sum is 37.

The square root of 75378133 is about 8682.0581085362. The cubic root of 75378133 is about 422.4238776061.

The spelling of 75378133 in words is "seventy-five million, three hundred seventy-eight thousand, one hundred thirty-three".