61113949 has 8 divisors (see below), whose sum is σ = 66206840. Its totient is φ = 56410848.

The previous prime is 61113947. The next prime is 61113953. The reversal of 61113949 is 94931116.

It is a happy number.

61113949 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 4 ways, for example, as 16957924 + 44156025 = 4118^2 + 6645^2 .

It is not a de Polignac number, because 61113949 - 2¹ = 61113947 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 (61113947) 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 7 ways as a sum of consecutive naturals, for example, 11712 + ... + 16105.

It is an arithmetic number, because the mean of its divisors is an integer number (8275855).

Almost surely, 2^61113949 is an apocalyptic number.

It is an amenable number.

61113949 is a deficient number, since it is larger than the sum of its proper divisors (5092891).

61113949 is an equidigital number, since it uses as much as digits as its factorization.

61113949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27856 (or 27830 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 61113949 is about 7817.5411095817. The cubic root of 61113949 is about 393.8946805513.

The spelling of 61113949 in words is "sixty-one million, one hundred thirteen thousand, nine hundred forty-nine".