61603103 has 4 divisors (see below), whose sum is σ = 61867728. Its totient is φ = 61338480.

The previous prime is 61603099. The next prime is 61603109. The reversal of 61603103 is 30130616.

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 61603103 - 2² = 61603099 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 (61603109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131963 + ... + 132428.

It is an arithmetic number, because the mean of its divisors is an integer number (15466932).

Almost surely, 2^61603103 is an apocalyptic number.

61603103 is a deficient number, since it is larger than the sum of its proper divisors (264625).

61603103 is a wasteful number, since it uses less digits than its factorization.

61603103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264624.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 61603103 is about 7848.7644250544. The cubic root of 61603103 is about 394.9427957538.

Adding to 61603103 its reverse (30130616), we get a palindrome (91733719).

The spelling of 61603103 in words is "sixty-one million, six hundred three thousand, one hundred three".