613638427 has 2 divisors, whose sum is σ = 613638428. Its totient is φ = 613638426.

The previous prime is 613638407. The next prime is 613638437. The reversal of 613638427 is 724836316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613638427 - 2⁷ = 613638299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613638427.

It is not a weakly prime, because it can be changed into another prime (613638407) 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 as a sum of consecutive naturals, namely, 306819213 + 306819214.

It is an arithmetic number, because the mean of its divisors is an integer number (306819214).

Almost surely, 2^613638427 is an apocalyptic number.

613638427 is a deficient number, since it is larger than the sum of its proper divisors (1).

613638427 is an equidigital number, since it uses as much as digits as its factorization.

613638427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 613638427 is about 24771.7263629324. The cubic root of 613638427 is about 849.7754548738.

The spelling of 613638427 in words is "six hundred thirteen million, six hundred thirty-eight thousand, four hundred twenty-seven".