61679769 has 8 divisors (see below), whose sum is σ = 82276320. Its totient is φ = 41101536.

The previous prime is 61679753. The next prime is 61679789. The reversal of 61679769 is 96797616.

61679769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61679769 - 2⁴ = 61679753 is a prime.

It is a super-2 number, since 2×61679769² = 7608787807786722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61679749) 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, 9237 + ... + 14445.

It is an arithmetic number, because the mean of its divisors is an integer number (10284540).

Almost surely, 2^61679769 is an apocalyptic number.

It is an amenable number.

61679769 is a deficient number, since it is larger than the sum of its proper divisors (20596551).

61679769 is a wasteful number, since it uses less digits than its factorization.

61679769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159.

The product of its digits is 857304, while the sum is 51.

The square root of 61679769 is about 7853.6468598989. The cubic root of 61679769 is about 395.1065652764.

The spelling of 61679769 in words is "sixty-one million, six hundred seventy-nine thousand, seven hundred sixty-nine".