61183979 has 4 divisors (see below), whose sum is σ = 63844176. Its totient is φ = 58523784.

The previous prime is 61183949. The next prime is 61184017. The reversal of 61183979 is 97938116.

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 61183979 - 2²⁰ = 60135403 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (61183949) 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 3 ways as a sum of consecutive naturals, for example, 1330064 + ... + 1330109.

It is an arithmetic number, because the mean of its divisors is an integer number (15961044).

Almost surely, 2^61183979 is an apocalyptic number.

61183979 is a deficient number, since it is larger than the sum of its proper divisors (2660197).

61183979 is a wasteful number, since it uses less digits than its factorization.

61183979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660196.

The product of its digits is 81648, while the sum is 44.

The square root of 61183979 is about 7822.0188570471. The cubic root of 61183979 is about 394.0450767395.

The spelling of 61183979 in words is "sixty-one million, one hundred eighty-three thousand, nine hundred seventy-nine".