136053721 has 4 divisors (see below), whose sum is σ = 137776000. Its totient is φ = 134331444.

The previous prime is 136053707. The next prime is 136053727. The reversal of 136053721 is 127350631.

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 not a de Polignac number, because 136053721 - 2⁵ = 136053689 is a prime.

It is a super-2 number, since 2×136053721² = 37021229995891682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136053721.

It is not an unprimeable number, because it can be changed into a prime (136053727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861021 + ... + 861178.

It is an arithmetic number, because the mean of its divisors is an integer number (34444000).

Almost surely, 2^136053721 is an apocalyptic number.

It is an amenable number.

136053721 is a deficient number, since it is larger than the sum of its proper divisors (1722279).

136053721 is an equidigital number, since it uses as much as digits as its factorization.

136053721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722278.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 136053721 is about 11664.2068311566. The cubic root of 136053721 is about 514.3240208937.

The spelling of 136053721 in words is "one hundred thirty-six million, fifty-three thousand, seven hundred twenty-one".