61111103 has 2 divisors, whose sum is σ = 61111104. Its totient is φ = 61111102.

The previous prime is 61111031. The next prime is 61111111. The reversal of 61111103 is 30111116.

Together with previous prime (61111031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61111103 - 2¹⁸ = 60848959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61111133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555551 + 30555552.

It is an arithmetic number, because the mean of its divisors is an integer number (30555552).

Almost surely, 2^61111103 is an apocalyptic number.

61111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

61111103 is an equidigital number, since it uses as much as digits as its factorization.

61111103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 61111103 is about 7817.3590809173. The cubic root of 61111103 is about 393.8885660626. Note that the first 3 decimals are identical.

Adding to 61111103 its reverse (30111116), we get a palindrome (91222219).

The spelling of 61111103 in words is "sixty-one million, one hundred eleven thousand, one hundred three".