133420978 has 8 divisors (see below), whose sum is σ = 202194972. Its totient is φ = 66022656.

The previous prime is 133420951. The next prime is 133420979. The reversal of 133420978 is 879024331.

It can be written as a sum of positive squares in 2 ways, for example, as 132641289 + 779689 = 11517^2 + 883^2 .

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

It is not an unprimeable number, because it can be changed into a prime (133420979) 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 in 3 ways as a sum of consecutive naturals, for example, 343675 + ... + 344062.

Almost surely, 2^133420978 is an apocalyptic number.

133420978 is a deficient number, since it is larger than the sum of its proper divisors (68773994).

133420978 is an equidigital number, since it uses as much as digits as its factorization.

133420978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687836.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 133420978 is about 11550.7998857222. The cubic root of 133420978 is about 510.9848686356.

The spelling of 133420978 in words is "one hundred thirty-three million, four hundred twenty thousand, nine hundred seventy-eight".