133881007 has 4 divisors (see below), whose sum is σ = 144179560. Its totient is φ = 123582456.

The previous prime is 133880983. The next prime is 133881053. The reversal of 133881007 is 700188331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133881007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133881007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133881107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149257 + ... + 5149282.

It is an arithmetic number, because the mean of its divisors is an integer number (36044890).

Almost surely, 2^133881007 is an apocalyptic number.

133881007 is a deficient number, since it is larger than the sum of its proper divisors (10298553).

133881007 is a wasteful number, since it uses less digits than its factorization.

133881007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10298552.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 133881007 is about 11570.6960464788. The cubic root of 133881007 is about 511.5714785538.

The spelling of 133881007 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, seven".