61279 has 4 divisors (see below), whose sum is σ = 61776. Its totient is φ = 60784.

The previous prime is 61261. The next prime is 61283. The reversal of 61279 is 97216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61279 - 2⁷ = 61151 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 (61379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102 + ... + 364.

It is an arithmetic number, because the mean of its divisors is an integer number (15444).

2⁶¹²⁷⁹ is an apocalyptic number.

61279 is a deficient number, since it is larger than the sum of its proper divisors (497).

61279 is a wasteful number, since it uses less digits than its factorization.

61279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496.

The product of its digits is 756, while the sum is 25.

The square root of 61279 is about 247.5459553295. The cubic root of 61279 is about 39.4248960127.

Subtracting 61279 from its reverse (97216), we obtain a cube (35937 = 33³).

The spelling of 61279 in words is "sixty-one thousand, two hundred seventy-nine".