133868141 has 4 divisors (see below), whose sum is σ = 146037984. Its totient is φ = 121698300.

The previous prime is 133868131. The next prime is 133868171. The reversal of 133868141 is 141868331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133868141 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 (133868101) 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, 6084905 + ... + 6084926.

It is an arithmetic number, because the mean of its divisors is an integer number (36509496).

Almost surely, 2^133868141 is an apocalyptic number.

133868141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133868141 is the 6185-th centered heptagonal number.

It is an amenable number.

133868141 is a deficient number, since it is larger than the sum of its proper divisors (12169843).

133868141 is a wasteful number, since it uses less digits than its factorization.

133868141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12169842.

The product of its digits is 13824, while the sum is 35.

The square root of 133868141 is about 11570.1400596536. The cubic root of 133868141 is about 511.5550906443. Note that the first 3 decimals are identical.

The spelling of 133868141 in words is "one hundred thirty-three million, eight hundred sixty-eight thousand, one hundred forty-one".