61020613 has 4 divisors (see below), whose sum is σ = 61146400. Its totient is φ = 60894828.

The previous prime is 61020581. The next prime is 61020623. The reversal of 61020613 is 31602016.

61020613 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61020613 - 2⁵ = 61020581 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 (61020623) 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, 62163 + ... + 63136.

It is an arithmetic number, because the mean of its divisors is an integer number (15286600).

Almost surely, 2^61020613 is an apocalyptic number.

It is an amenable number.

61020613 is a deficient number, since it is larger than the sum of its proper divisors (125787).

61020613 is a wasteful number, since it uses less digits than its factorization.

61020613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125786.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 61020613 is about 7811.5691765483. The cubic root of 61020613 is about 393.6940537628.

Adding to 61020613 its reverse (31602016), we get a palindrome (92622629).

The spelling of 61020613 in words is "sixty-one million, twenty thousand, six hundred thirteen".