133317388 has 12 divisors (see below), whose sum is σ = 234325840. Its totient is φ = 66367152.

The previous prime is 133317377. The next prime is 133317397. The reversal of 133317388 is 883713331.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71856 + ... + 73687.

Almost surely, 2^133317388 is an apocalyptic number.

It is an amenable number.

133317388 is a deficient number, since it is larger than the sum of its proper divisors (101008452).

133317388 is a wasteful number, since it uses less digits than its factorization.

133317388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145776 (or 145774 counting only the distinct ones).

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

The square root of 133317388 is about 11546.3149099615. The cubic root of 133317388 is about 510.8525890183.

It can be divided in two parts, 1333 and 17388, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 133317388 in words is "one hundred thirty-three million, three hundred seventeen thousand, three hundred eighty-eight".