133949970 has 256 divisors, whose sum is σ = 472780800. Its totient is φ = 26127360.

The previous prime is 133949947. The next prime is 133950007. The reversal of 133949970 is 79949331.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 353241 + ... + 353619.

It is an arithmetic number, because the mean of its divisors is an integer number (1846800).

Almost surely, 2^133949970 is an apocalyptic number.

133949970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133949970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236390400).

133949970 is an abundant number, since it is smaller than the sum of its proper divisors (338830830).

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

133949970 is a wasteful number, since it uses less digits than its factorization.

133949970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 133949970 is about 11573.6757341823. The cubic root of 133949970 is about 511.6593014368.

The spelling of 133949970 in words is "one hundred thirty-three million, nine hundred forty-nine thousand, nine hundred seventy".