61650979 has 4 divisors (see below), whose sum is σ = 66393376. Its totient is φ = 56908584.

The previous prime is 61650977. The next prime is 61650997. The reversal of 61650979 is 97905616.

61650979 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 a cyclic number.

It is not a de Polignac number, because 61650979 - 2¹ = 61650977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650977) 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, 2371179 + ... + 2371204.

It is an arithmetic number, because the mean of its divisors is an integer number (16598344).

Almost surely, 2^61650979 is an apocalyptic number.

61650979 is a deficient number, since it is larger than the sum of its proper divisors (4742397).

61650979 is a wasteful number, since it uses less digits than its factorization.

61650979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742396.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 61650979 is about 7851.8137395127. The cubic root of 61650979 is about 395.0450816462.

The spelling of 61650979 in words is "sixty-one million, six hundred fifty thousand, nine hundred seventy-nine".