61903 has 4 divisors (see below), whose sum is σ = 62608. Its totient is φ = 61200.

The previous prime is 61879. The next prime is 61909. The reversal of 61903 is 30916.

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 61903 - 2⁵ = 61871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61909) 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, 198 + ... + 403.

It is an arithmetic number, because the mean of its divisors is an integer number (15652).

2⁶¹⁹⁰³ is an apocalyptic number.

61903 is a deficient number, since it is larger than the sum of its proper divisors (705).

61903 is a wasteful number, since it uses less digits than its factorization.

61903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 61903 is about 248.8031350285. The cubic root of 61903 is about 39.5582647057.

The spelling of 61903 in words is "sixty-one thousand, nine hundred three".