133689607 has 4 divisors (see below), whose sum is σ = 134278776. Its totient is φ = 133100440.

The previous prime is 133689599. The next prime is 133689617. The reversal of 133689607 is 706986331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706986331 = 29 ⋅24378839.

It is a cyclic number.

It is not a de Polignac number, because 133689607 - 2³ = 133689599 is a prime.

It is a super-2 number, since 2×133689607² = 35745822039628898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133689617) 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, 294244 + ... + 294697.

It is an arithmetic number, because the mean of its divisors is an integer number (33569694).

Almost surely, 2^133689607 is an apocalyptic number.

133689607 is a deficient number, since it is larger than the sum of its proper divisors (589169).

133689607 is an equidigital number, since it uses as much as digits as its factorization.

133689607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589168.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 133689607 is about 11562.4221943328. The cubic root of 133689607 is about 511.3275766969.

The spelling of 133689607 in words is "one hundred thirty-three million, six hundred eighty-nine thousand, six hundred seven".