61319 has 4 divisors (see below), whose sum is σ = 64944. Its totient is φ = 57696.

The previous prime is 61297. The next prime is 61331. The reversal of 61319 is 91316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61319 - 2¹² = 57223 is a prime.

It is a super-2 number, since 2×61319² = 7520039522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61339) 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 3 ways as a sum of consecutive naturals, for example, 1787 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (16236).

2⁶¹³¹⁹ is an apocalyptic number.

61319 is a deficient number, since it is larger than the sum of its proper divisors (3625).

61319 is a wasteful number, since it uses less digits than its factorization.

61319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624.

The product of its digits is 162, while the sum is 20.

The square root of 61319 is about 247.6267352287. The cubic root of 61319 is about 39.4334723757.

The spelling of 61319 in words is "sixty-one thousand, three hundred nineteen".