133987000 has 64 divisors (see below), whose sum is σ = 358338240. Its totient is φ = 45936000.

The previous prime is 133986971. The next prime is 133987001. The reversal of 133987000 is 789331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133987001) 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, 2571 + ... + 16570.

It is an arithmetic number, because the mean of its divisors is an integer number (5599035).

Almost surely, 2^133987000 is an apocalyptic number.

133987000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133987000 is an abundant number, since it is smaller than the sum of its proper divisors (224351240).

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

133987000 is a wasteful number, since it uses less digits than its factorization.

133987000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19169 (or 19155 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 133987000 is about 11575.2753746941. The cubic root of 133987000 is about 511.7064459000.

The spelling of 133987000 in words is "one hundred thirty-three million, nine hundred eighty-seven thousand".