133501378 has 16 divisors (see below), whose sum is σ = 203859936. Its totient is φ = 65556000.

The previous prime is 133501351. The next prime is 133501387. The reversal of 133501378 is 873105331.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34825 + ... + 38467.

It is an arithmetic number, because the mean of its divisors is an integer number (12741246).

Almost surely, 2^133501378 is an apocalyptic number.

133501378 is a deficient number, since it is larger than the sum of its proper divisors (70358558).

133501378 is a wasteful number, since it uses less digits than its factorization.

133501378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 133501378 is about 11554.2796400295. The cubic root of 133501378 is about 511.0874885147.

The spelling of 133501378 in words is "one hundred thirty-three million, five hundred one thousand, three hundred seventy-eight".