61303 has 4 divisors (see below), whose sum is σ = 66888. Its totient is φ = 55720.

The previous prime is 61297. The next prime is 61331. The reversal of 61303 is 30316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61303 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 (61333) 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, 2776 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (16722).

2⁶¹³⁰³ is an apocalyptic number.

61303 is a deficient number, since it is larger than the sum of its proper divisors (5585).

61303 is a wasteful number, since it uses less digits than its factorization.

61303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 61303 is about 247.5944264316. The cubic root of 61303 is about 39.4300422782.

Adding to 61303 its sum of digits (13), we get a palindrome (61316).

Adding to 61303 its reverse (30316), we get a palindrome (91619).

The spelling of 61303 in words is "sixty-one thousand, three hundred three".