609136421 has 2 divisors, whose sum is σ = 609136422. Its totient is φ = 609136420.

The previous prime is 609136397. The next prime is 609136427. The reversal of 609136421 is 124631906.

609136421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437395396 + 171741025 = 20914^2 + 13105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609136421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609136427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304568210 + 304568211.

It is an arithmetic number, because the mean of its divisors is an integer number (304568211).

Almost surely, 2^609136421 is an apocalyptic number.

It is an amenable number.

609136421 is a deficient number, since it is larger than the sum of its proper divisors (1).

609136421 is an equidigital number, since it uses as much as digits as its factorization.

609136421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 609136421 is about 24680.6892326774. The cubic root of 609136421 is about 847.6922040089.

The spelling of 609136421 in words is "six hundred nine million, one hundred thirty-six thousand, four hundred twenty-one".