133981700 has 18 divisors (see below), whose sum is σ = 290740506. Its totient is φ = 53592640.

The previous prime is 133981669. The next prime is 133981723. The reversal of 133981700 is 7189331.

It can be written as a sum of positive squares in 3 ways, for example, as 41783296 + 92198404 = 6464^2 + 9602^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669809 + ... + 670008.

Almost surely, 2^133981700 is an apocalyptic number.

133981700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133981700 is an abundant number, since it is smaller than the sum of its proper divisors (156758806).

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

133981700 is a wasteful number, since it uses less digits than its factorization.

133981700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339831 (or 1339824 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 133981700 is about 11575.0464361920. The cubic root of 133981700 is about 511.6996987779.

The spelling of 133981700 in words is "one hundred thirty-three million, nine hundred eighty-one thousand, seven hundred".