61791 has 8 divisors (see below), whose sum is σ = 84480. Its totient is φ = 40152.

The previous prime is 61781. The next prime is 61813. The reversal of 61791 is 19716.

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

It is not a de Polignac number, because 61791 - 2¹¹ = 59743 is a prime.

61791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61751) 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 in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 368.

It is an arithmetic number, because the mean of its divisors is an integer number (10560).

2⁶¹⁷⁹¹ is an apocalyptic number.

61791 is a deficient number, since it is larger than the sum of its proper divisors (22689).

61791 is a wasteful number, since it uses less digits than its factorization.

61791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525.

The product of its digits is 378, while the sum is 24.

The square root of 61791 is about 248.5779555793. The cubic root of 61791 is about 39.5343929474.

The spelling of 61791 in words is "sixty-one thousand, seven hundred ninety-one".