61111073 has 6 divisors (see below), whose sum is σ = 64917606. Its totient is φ = 57516032.

The previous prime is 61111031. The next prime is 61111103. The reversal of 61111073 is 37011116.

61111073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 10316944 + 50794129 = 3212^2 + 7127^2 .

It is not a de Polignac number, because 61111073 - 2⁸ = 61110817 is a prime.

It is a super-2 number, since 2×61111073² = 7469126486422658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61111273) 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 5 ways as a sum of consecutive naturals, for example, 105440 + ... + 106017.

It is an arithmetic number, because the mean of its divisors is an integer number (10819601).

Almost surely, 2^61111073 is an apocalyptic number.

It is an amenable number.

61111073 is a deficient number, since it is larger than the sum of its proper divisors (3806533).

61111073 is a wasteful number, since it uses less digits than its factorization.

61111073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211491 (or 211474 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 61111073 is about 7817.3571621105. The cubic root of 61111073 is about 393.8885016081. Note that the first 3 decimals are identical.

Adding to 61111073 its reverse (37011116), we get a palindrome (98122189).

The spelling of 61111073 in words is "sixty-one million, one hundred eleven thousand, seventy-three".