61710979 has 4 divisors (see below), whose sum is σ = 67321080. Its totient is φ = 56100880.

The previous prime is 61710973. The next prime is 61711033. The reversal of 61710979 is 97901716.

61710979 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 is not a de Polignac number, because 61710979 - 2⁷ = 61710851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61710973) 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, 2805034 + ... + 2805055.

It is an arithmetic number, because the mean of its divisors is an integer number (16830270).

Almost surely, 2^61710979 is an apocalyptic number.

61710979 is a deficient number, since it is larger than the sum of its proper divisors (5610101).

61710979 is a wasteful number, since it uses less digits than its factorization.

61710979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610100.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 61710979 is about 7855.6335836137. The cubic root of 61710979 is about 395.1731954255.

The spelling of 61710979 in words is "sixty-one million, seven hundred ten thousand, nine hundred seventy-nine".