133690511 has 4 divisors (see below), whose sum is σ = 133742400. Its totient is φ = 133638624.

The previous prime is 133690477. The next prime is 133690537. The reversal of 133690511 is 115096331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133690511 - 2¹⁰ = 133689487 is a prime.

It is a super-2 number, since 2×133690511² = 35746305462882242, 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 (133690111) 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, 21866 + ... + 27303.

It is an arithmetic number, because the mean of its divisors is an integer number (33435600).

Almost surely, 2^133690511 is an apocalyptic number.

133690511 is a deficient number, since it is larger than the sum of its proper divisors (51889).

133690511 is an equidigital number, since it uses as much as digits as its factorization.

133690511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51888.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 133690511 is about 11562.4612864217. The cubic root of 133690511 is about 511.3287292150.

The spelling of 133690511 in words is "one hundred thirty-three million, six hundred ninety thousand, five hundred eleven".