133997020 has 24 divisors (see below), whose sum is σ = 288258768. Its totient is φ = 52291200.

The previous prime is 133996999. The next prime is 133997021. The reversal of 133997020 is 20799331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133997021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80886 + ... + 82525.

It is an arithmetic number, because the mean of its divisors is an integer number (12010782).

Almost surely, 2^133997020 is an apocalyptic number.

133997020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133997020 is an abundant number, since it is smaller than the sum of its proper divisors (154261748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133997020 is a wasteful number, since it uses less digits than its factorization.

133997020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163461 (or 163459 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 133997020 is about 11575.7081856792. The cubic root of 133997020 is about 511.7192012936.

The spelling of 133997020 in words is "one hundred thirty-three million, nine hundred ninety-seven thousand, twenty".