61384021 has 8 divisors (see below), whose sum is σ = 63552384. Its totient is φ = 59251680.

The previous prime is 61384019. The next prime is 61384049. The reversal of 61384021 is 12048316.

61384021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61384021 - 2¹ = 61384019 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 (61384051) 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 7 ways as a sum of consecutive naturals, for example, 5515 + ... + 12376.

It is an arithmetic number, because the mean of its divisors is an integer number (7944048).

Almost surely, 2^61384021 is an apocalyptic number.

It is an amenable number.

61384021 is a deficient number, since it is larger than the sum of its proper divisors (2168363).

61384021 is a wasteful number, since it uses less digits than its factorization.

61384021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18011.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 61384021 is about 7834.7955301973. The cubic root of 61384021 is about 394.4740551261.

The spelling of 61384021 in words is "sixty-one million, three hundred eighty-four thousand, twenty-one".