61427983 has 4 divisors (see below), whose sum is σ = 61672968. Its totient is φ = 61183000.

The previous prime is 61427981. The next prime is 61427999. The reversal of 61427983 is 38972416.

61427983 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 61427983 - 2¹ = 61427981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61427981) 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, 122116 + ... + 122617.

It is an arithmetic number, because the mean of its divisors is an integer number (15418242).

Almost surely, 2^61427983 is an apocalyptic number.

61427983 is a deficient number, since it is larger than the sum of its proper divisors (244985).

61427983 is a wasteful number, since it uses less digits than its factorization.

61427983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244984.

The product of its digits is 72576, while the sum is 40.

The square root of 61427983 is about 7837.6005894661. The cubic root of 61427983 is about 394.5682041126.

The spelling of 61427983 in words is "sixty-one million, four hundred twenty-seven thousand, nine hundred eighty-three".