605632861 has 4 divisors (see below), whose sum is σ = 605727900. Its totient is φ = 605537824.

The previous prime is 605632843. The next prime is 605632873. The reversal of 605632861 is 168236506.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168236506 = 2 ⋅84118253.

It can be written as a sum of positive squares in 2 ways, for example, as 118592100 + 487040761 = 10890^2 + 22069^2 .

It is a cyclic number.

It is not a de Polignac number, because 605632861 - 2⁵ = 605632829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 605632861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605632801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37216 + ... + 50953.

It is an arithmetic number, because the mean of its divisors is an integer number (151431975).

Almost surely, 2^605632861 is an apocalyptic number.

It is an amenable number.

605632861 is a deficient number, since it is larger than the sum of its proper divisors (95039).

605632861 is an equidigital number, since it uses as much as digits as its factorization.

605632861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95038.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 605632861 is about 24609.6091192038. The cubic root of 605632861 is about 846.0638589654.

The spelling of 605632861 in words is "six hundred five million, six hundred thirty-two thousand, eight hundred sixty-one".