61924109 has 4 divisors (see below), whose sum is σ = 66687516. Its totient is φ = 57160704.

The previous prime is 61924103. The next prime is 61924111. The reversal of 61924109 is 90142916.

61924109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4012009 + 57912100 = 2003^2 + 7610^2 .

It is a cyclic number.

It is not a de Polignac number, because 61924109 - 2²⁰ = 60875533 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 (61924103) 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 3 ways as a sum of consecutive naturals, for example, 2381684 + ... + 2381709.

It is an arithmetic number, because the mean of its divisors is an integer number (16671879).

Almost surely, 2^61924109 is an apocalyptic number.

It is an amenable number.

61924109 is a deficient number, since it is larger than the sum of its proper divisors (4763407).

61924109 is a wasteful number, since it uses less digits than its factorization.

61924109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763406.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 61924109 is about 7869.1873150917. The cubic root of 61924109 is about 395.6276066720.

It can be divided in two parts, 6192 and 4109, that added together give a palindrome (10301).

The spelling of 61924109 in words is "sixty-one million, nine hundred twenty-four thousand, one hundred nine".