136376021 has 8 divisors (see below), whose sum is σ = 138605760. Its totient is φ = 134152128.

The previous prime is 136376003. The next prime is 136376027. The reversal of 136376021 is 120673631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136376021 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 (136376027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90845 + ... + 92333.

It is an arithmetic number, because the mean of its divisors is an integer number (17325720).

Almost surely, 2^136376021 is an apocalyptic number.

It is an amenable number.

136376021 is a deficient number, since it is larger than the sum of its proper divisors (2229739).

136376021 is a wasteful number, since it uses less digits than its factorization.

136376021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 136376021 is about 11678.0144288316. The cubic root of 136376021 is about 514.7298309588.

The spelling of 136376021 in words is "one hundred thirty-six million, three hundred seventy-six thousand, twenty-one".