61317871 has 16 divisors (see below), whose sum is σ = 64697248. Its totient is φ = 58060800.

The previous prime is 61317869. The next prime is 61317889. The reversal of 61317871 is 17871316.

It is a cyclic number.

It is not a de Polignac number, because 61317871 - 2¹ = 61317869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61317811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254311 + ... + 254551.

It is an arithmetic number, because the mean of its divisors is an integer number (4043578).

Almost surely, 2^61317871 is an apocalyptic number.

61317871 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61317871 is a deficient number, since it is larger than the sum of its proper divisors (3379377).

61317871 is a wasteful number, since it uses less digits than its factorization.

61317871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 7056, while the sum is 34.

The square root of 61317871 is about 7830.5728398375. The cubic root of 61317871 is about 394.3323035897.

The spelling of 61317871 in words is "sixty-one million, three hundred seventeen thousand, eight hundred seventy-one".