133339691 has 4 divisors (see below), whose sum is σ = 133501752. Its totient is φ = 133177632.

The previous prime is 133339681. The next prime is 133339697. The reversal of 133339691 is 196933331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196933331 = 7 ⋅28133333.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133339691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133339697) 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, 79790 + ... + 81443.

It is an arithmetic number, because the mean of its divisors is an integer number (33375438).

Almost surely, 2^133339691 is an apocalyptic number.

133339691 is a deficient number, since it is larger than the sum of its proper divisors (162061).

133339691 is an equidigital number, since it uses as much as digits as its factorization.

133339691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162060.

The product of its digits is 39366, while the sum is 38.

The square root of 133339691 is about 11547.2806755530. The cubic root of 133339691 is about 510.8810746999.

The spelling of 133339691 in words is "one hundred thirty-three million, three hundred thirty-nine thousand, six hundred ninety-one".