617632427 has 4 divisors (see below), whose sum is σ = 617724240. Its totient is φ = 617540616.

The previous prime is 617632403. The next prime is 617632447. The reversal of 617632427 is 724236716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617632427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617632447) 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, 34943 + ... + 49560.

It is an arithmetic number, because the mean of its divisors is an integer number (154431060).

Almost surely, 2^617632427 is an apocalyptic number.

617632427 is a deficient number, since it is larger than the sum of its proper divisors (91813).

617632427 is an equidigital number, since it uses as much as digits as its factorization.

617632427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91812.

The product of its digits is 84672, while the sum is 38.

The square root of 617632427 is about 24852.2117124412. The cubic root of 617632427 is about 851.6151191840.

The spelling of 617632427 in words is "six hundred seventeen million, six hundred thirty-two thousand, four hundred twenty-seven".