61585979 has 16 divisors (see below), whose sum is σ = 76590528. Its totient is φ = 48218112.

The previous prime is 61585969. The next prime is 61585987. The reversal of 61585979 is 97958516.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61585979 - 2¹⁶ = 61520443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61585969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5339 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (4786908).

Almost surely, 2^61585979 is an apocalyptic number.

61585979 is a deficient number, since it is larger than the sum of its proper divisors (15004549).

61585979 is a wasteful number, since it uses less digits than its factorization.

61585979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7094.

The product of its digits is 680400, while the sum is 50.

The square root of 61585979 is about 7847.6734768975. The cubic root of 61585979 is about 394.9061978833.

The spelling of 61585979 in words is "sixty-one million, five hundred eighty-five thousand, nine hundred seventy-nine".