61604171 has 2 divisors, whose sum is σ = 61604172. Its totient is φ = 61604170.

The previous prime is 61604119. The next prime is 61604173. The reversal of 61604171 is 17140616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61604171 - 2¹⁰ = 61603147 is a prime.

Together with 61604173, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61604171.

It is not a weakly prime, because it can be changed into another prime (61604173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802085 + 30802086.

It is an arithmetic number, because the mean of its divisors is an integer number (30802086).

Almost surely, 2^61604171 is an apocalyptic number.

61604171 is a deficient number, since it is larger than the sum of its proper divisors (1).

61604171 is an equidigital number, since it uses as much as digits as its factorization.

61604171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 61604171 is about 7848.8324609460. The cubic root of 61604171 is about 394.9450780873.

Adding to 61604171 its reverse (17140616), we get a palindrome (78744787).

The spelling of 61604171 in words is "sixty-one million, six hundred four thousand, one hundred seventy-one".