61603 has 2 divisors, whose sum is σ = 61604. Its totient is φ = 61602.

The previous prime is 61583. The next prime is 61609. The reversal of 61603 is 30616.

It is a happy number.

61603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61603 - 2⁹ = 61091 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (61609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30801 + 30802.

It is an arithmetic number, because the mean of its divisors is an integer number (30802).

2⁶¹⁶⁰³ is an apocalyptic number.

61603 is a deficient number, since it is larger than the sum of its proper divisors (1).

61603 is an equidigital number, since it uses as much as digits as its factorization.

61603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 61603 is about 248.1995165185. The cubic root of 61603 is about 39.4942575640.

The spelling of 61603 in words is "sixty-one thousand, six hundred three".