133351978 has 32 divisors (see below), whose sum is σ = 217553040. Its totient is φ = 61071360.

The previous prime is 133351973. The next prime is 133351979. The reversal of 133351978 is 879153331.

It can be written as a sum of positive squares in 8 ways, for example, as 1951609 + 131400369 = 1397^2 + 11463^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133351978.

It is not an unprimeable number, because it can be changed into a prime (133351973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234078 + ... + 234646.

Almost surely, 2^133351978 is an apocalyptic number.

133351978 is a deficient number, since it is larger than the sum of its proper divisors (84201062).

133351978 is a wasteful number, since it uses less digits than its factorization.

133351978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762.

The product of its digits is 68040, while the sum is 40.

The square root of 133351978 is about 11547.8126933199. The cubic root of 133351978 is about 510.8967664591.

The spelling of 133351978 in words is "one hundred thirty-three million, three hundred fifty-one thousand, nine hundred seventy-eight".