61729086 has 16 divisors (see below), whose sum is σ = 123542784. Its totient is φ = 20562264.

The previous prime is 61729039. The next prime is 61729111. The reversal of 61729086 is 68092716.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9885 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (7721424).

Almost surely, 2^61729086 is an apocalyptic number.

61729086 is an abundant number, since it is smaller than the sum of its proper divisors (61813698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61729086 is a wasteful number, since it uses less digits than its factorization.

61729086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 61729086 is about 7856.7859841032. The cubic root of 61729086 is about 395.2118417163.

The spelling of 61729086 in words is "sixty-one million, seven hundred twenty-nine thousand, eighty-six".