136617421 has 4 divisors (see below), whose sum is σ = 136744192. Its totient is φ = 136490652.

The previous prime is 136617413. The next prime is 136617433. The reversal of 136617421 is 124716631.

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 136617421 - 2³ = 136617413 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 (136617451) 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 3 ways as a sum of consecutive naturals, for example, 61755 + ... + 63928.

It is an arithmetic number, because the mean of its divisors is an integer number (34186048).

Almost surely, 2^136617421 is an apocalyptic number.

It is an amenable number.

136617421 is a deficient number, since it is larger than the sum of its proper divisors (126771).

136617421 is a wasteful number, since it uses less digits than its factorization.

136617421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126770.

The product of its digits is 6048, while the sum is 31.

The square root of 136617421 is about 11688.3455202180. The cubic root of 136617421 is about 515.0333607069.

The spelling of 136617421 in words is "one hundred thirty-six million, six hundred seventeen thousand, four hundred twenty-one".