133669378 has 4 divisors (see below), whose sum is σ = 200504070. Its totient is φ = 66834688.

The previous prime is 133669273. The next prime is 133669379. The reversal of 133669378 is 873966331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 133102369 + 567009 = 11537^2 + 753^2 .

It is a super-2 number, since 2×133669378² = 35735005229813768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133669379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33417343 + ... + 33417346.

Almost surely, 2^133669378 is an apocalyptic number.

133669378 is a deficient number, since it is larger than the sum of its proper divisors (66834692).

133669378 is an equidigital number, since it uses as much as digits as its factorization.

133669378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66834691.

The product of its digits is 489888, while the sum is 46.

The square root of 133669378 is about 11561.5473877851. The cubic root of 133669378 is about 511.3017851949.

The spelling of 133669378 in words is "one hundred thirty-three million, six hundred sixty-nine thousand, three hundred seventy-eight".