61306861 has 8 divisors (see below), whose sum is σ = 76434624. Its totient is φ = 47771520.

The previous prime is 61306859. The next prime is 61306877. The reversal of 61306861 is 16860316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61306861 - 2¹ = 61306859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61306801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398020 + ... + 398173.

It is an arithmetic number, because the mean of its divisors is an integer number (9554328).

Almost surely, 2^61306861 is an apocalyptic number.

It is an amenable number.

61306861 is a deficient number, since it is larger than the sum of its proper divisors (15127763).

61306861 is a wasteful number, since it uses less digits than its factorization.

61306861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796211.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61306861 is about 7829.8697945751. The cubic root of 61306861 is about 394.3087005820.

The spelling of 61306861 in words is "sixty-one million, three hundred six thousand, eight hundred sixty-one".