133378942 has 4 divisors (see below), whose sum is σ = 200068416. Its totient is φ = 66689470.

The previous prime is 133378937. The next prime is 133378943. The reversal of 133378942 is 249873331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249873331 = 1931 ⋅129401.

It is a junction number, because it is equal to n+sod(n) for n = 133378895 and 133378904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133378943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33344734 + ... + 33344737.

It is an arithmetic number, because the mean of its divisors is an integer number (50017104).

Almost surely, 2^133378942 is an apocalyptic number.

133378942 is a deficient number, since it is larger than the sum of its proper divisors (66689474).

133378942 is an equidigital number, since it uses as much as digits as its factorization.

133378942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66689473.

The product of its digits is 108864, while the sum is 40.

The square root of 133378942 is about 11548.9801281325. The cubic root of 133378942 is about 510.9311988742.

The spelling of 133378942 in words is "one hundred thirty-three million, three hundred seventy-eight thousand, nine hundred forty-two".