133379691 has 16 divisors (see below), whose sum is σ = 187418880. Its totient is φ = 84207200.

The previous prime is 133379669. The next prime is 133379711. The reversal of 133379691 is 196973331.

It is a cyclic number.

It is not a de Polignac number, because 133379691 - 2⁶ = 133379627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133379621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2601 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (11713680).

Almost surely, 2^133379691 is an apocalyptic number.

133379691 is a deficient number, since it is larger than the sum of its proper divisors (54039189).

133379691 is a wasteful number, since it uses less digits than its factorization.

133379691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19266.

The product of its digits is 91854, while the sum is 42.

The square root of 133379691 is about 11549.0125551928. The cubic root of 133379691 is about 510.9321552640.

The spelling of 133379691 in words is "one hundred thirty-three million, three hundred seventy-nine thousand, six hundred ninety-one".