134117821 has 4 divisors (see below), whose sum is σ = 134141152. Its totient is φ = 134094492.

The previous prime is 134117813. The next prime is 134117831. The reversal of 134117821 is 128711431.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 134117821 - 2³ = 134117813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134117821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134117801) 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, 3736 + ... + 16798.

It is an arithmetic number, because the mean of its divisors is an integer number (33535288).

Almost surely, 2^134117821 is an apocalyptic number.

It is an amenable number.

134117821 is a deficient number, since it is larger than the sum of its proper divisors (23331).

134117821 is a wasteful number, since it uses less digits than its factorization.

134117821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23330.

The product of its digits is 1344, while the sum is 28.

The square root of 134117821 is about 11580.9248767100. The cubic root of 134117821 is about 511.8729301461.

The spelling of 134117821 in words is "one hundred thirty-four million, one hundred seventeen thousand, eight hundred twenty-one".