61973605 has 4 divisors (see below), whose sum is σ = 74368332. Its totient is φ = 49578880.

The previous prime is 61973603. The next prime is 61973623. The reversal of 61973605 is 50637916.

61973605 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 45724644 + 16248961 = 6762^2 + 4031^2 .

It is not a de Polignac number, because 61973605 - 2¹ = 61973603 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 (61973603) 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, 6197356 + ... + 6197365.

It is an arithmetic number, because the mean of its divisors is an integer number (18592083).

Almost surely, 2^61973605 is an apocalyptic number.

It is an amenable number.

61973605 is a deficient number, since it is larger than the sum of its proper divisors (12394727).

61973605 is a wasteful number, since it uses less digits than its factorization.

61973605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12394726.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 61973605 is about 7872.3316114097. The cubic root of 61973605 is about 395.7329871092.

The spelling of 61973605 in words is "sixty-one million, nine hundred seventy-three thousand, six hundred five".