133699397 has 8 divisors (see below), whose sum is σ = 144074616. Its totient is φ = 123337152.

The previous prime is 133699387. The next prime is 133699411. The reversal of 133699397 is 793996331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28718881 + 104980516 = 5359^2 + 10246^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133699397 - 2¹⁶ = 133633861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133699387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34523 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (18009327).

Almost surely, 2^133699397 is an apocalyptic number.

It is an amenable number.

133699397 is a deficient number, since it is larger than the sum of its proper divisors (10375219).

133699397 is a wasteful number, since it uses less digits than its factorization.

133699397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6487.

The product of its digits is 826686, while the sum is 50.

The square root of 133699397 is about 11562.8455407828. The cubic root of 133699397 is about 511.3400577837.

The spelling of 133699397 in words is "one hundred thirty-three million, six hundred ninety-nine thousand, three hundred ninety-seven".