133021988 has 24 divisors (see below), whose sum is σ = 254733024. Its totient is φ = 60278400.

The previous prime is 133021963. The next prime is 133022003. The reversal of 133021988 is 889120331.

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, 10343 + ... + 19313.

It is an arithmetic number, because the mean of its divisors is an integer number (10613876).

Almost surely, 2^133021988 is an apocalyptic number.

It is an amenable number.

133021988 is a deficient number, since it is larger than the sum of its proper divisors (121711036).

133021988 is a wasteful number, since it uses less digits than its factorization.

133021988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9323 (or 9321 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 133021988 is about 11533.5158559738. The cubic root of 133021988 is about 510.4750002387.

The spelling of 133021988 in words is "one hundred thirty-three million, twenty-one thousand, nine hundred eighty-eight".