133306987 has 4 divisors (see below), whose sum is σ = 145425816. Its totient is φ = 121188160.

The previous prime is 133306969. The next prime is 133307023. The reversal of 133306987 is 789603331.

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-133306987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133306087) 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, 6059398 + ... + 6059419.

It is an arithmetic number, because the mean of its divisors is an integer number (36356454).

Almost surely, 2^133306987 is an apocalyptic number.

133306987 is a deficient number, since it is larger than the sum of its proper divisors (12118829).

133306987 is a wasteful number, since it uses less digits than its factorization.

133306987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12118828.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 133306987 is about 11545.8644977325. The cubic root of 133306987 is about 510.8393036396.

The spelling of 133306987 in words is "one hundred thirty-three million, three hundred six thousand, nine hundred eighty-seven".