61579 has 8 divisors (see below), whose sum is σ = 74240. Its totient is φ = 49896.

The previous prime is 61561. The next prime is 61583. The reversal of 61579 is 97516.

It is a happy number.

61579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61579 - 2⁵ = 61547 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 (61519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 364.

It is an arithmetic number, because the mean of its divisors is an integer number (9280).

2⁶¹⁵⁷⁹ is an apocalyptic number.

61579 is the 133-rd nonagonal number.

61579 is a deficient number, since it is larger than the sum of its proper divisors (12661).

61579 is a wasteful number, since it uses less digits than its factorization.

61579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its digits is 1890, while the sum is 28.

The square root of 61579 is about 248.1511636080. The cubic root of 61579 is about 39.4891280232.

Subtracting 61579 from its reverse (97516), we obtain a cube (35937 = 33³).

The spelling of 61579 in words is "sixty-one thousand, five hundred seventy-nine".