61969685 has 4 divisors (see below), whose sum is σ = 74363628. Its totient is φ = 49575744.

The previous prime is 61969643. The next prime is 61969703. The reversal of 61969685 is 58696916.

61969685 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 7711729 + 54257956 = 2777^2 + 7366^2 .

It is a cyclic number.

It is not a de Polignac number, because 61969685 - 2¹⁰ = 61968661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 6196964 + ... + 6196973.

It is an arithmetic number, because the mean of its divisors is an integer number (18590907).

Almost surely, 2^61969685 is an apocalyptic number.

It is an amenable number.

61969685 is a deficient number, since it is larger than the sum of its proper divisors (12393943).

61969685 is a wasteful number, since it uses less digits than its factorization.

61969685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12393942.

The product of its digits is 699840, while the sum is 50.

The square root of 61969685 is about 7872.0826342208. The cubic root of 61969685 is about 395.7246432020.

It can be divided in two parts, 6 and 1969685, that added together give a palindrome (1969691).

The spelling of 61969685 in words is "sixty-one million, nine hundred sixty-nine thousand, six hundred eighty-five".