61978673 has 8 divisors (see below), whose sum is σ = 62875008. Its totient is φ = 61086064.

The previous prime is 61978649. The next prime is 61978687. The reversal of 61978673 is 37687916.

61978673 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 a cyclic number.

It is not a de Polignac number, because 61978673 - 2¹⁴ = 61962289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61978603) 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, 55640 + ... + 56742.

It is an arithmetic number, because the mean of its divisors is an integer number (7859376).

Almost surely, 2^61978673 is an apocalyptic number.

It is an amenable number.

61978673 is a deficient number, since it is larger than the sum of its proper divisors (896335).

61978673 is a wasteful number, since it uses less digits than its factorization.

61978673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863.

The product of its digits is 381024, while the sum is 47.

The square root of 61978673 is about 7872.6534916761. The cubic root of 61978673 is about 395.7437740676.

The spelling of 61978673 in words is "sixty-one million, nine hundred seventy-eight thousand, six hundred seventy-three".