61924609 has 4 divisors (see below), whose sum is σ = 61995780. Its totient is φ = 61853440.

The previous prime is 61924561. The next prime is 61924613. The reversal of 61924609 is 90642916.

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 42211009 + 19713600 = 6497^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 61924609 - 2⁷ = 61924481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61924619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34264 + ... + 36025.

It is an arithmetic number, because the mean of its divisors is an integer number (15498945).

Almost surely, 2^61924609 is an apocalyptic number.

It is an amenable number.

61924609 is a deficient number, since it is larger than the sum of its proper divisors (71171).

61924609 is an equidigital number, since it uses as much as digits as its factorization.

61924609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71170.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 61924609 is about 7869.2190845090. The cubic root of 61924609 is about 395.6286714876.

It can be divided in two parts, 6192 and 4609, that added together give a palindrome (10801).

The spelling of 61924609 in words is "sixty-one million, nine hundred twenty-four thousand, six hundred nine".