61305013 has 12 divisors (see below), whose sum is σ = 77012320. Its totient is φ = 47769480.

The previous prime is 61304981. The next prime is 61305019. The reversal of 61305013 is 31050316.

It is not a de Polignac number, because 61305013 - 2⁵ = 61304981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35343 + ... + 37036.

Almost surely, 2^61305013 is an apocalyptic number.

It is an amenable number.

61305013 is a deficient number, since it is larger than the sum of its proper divisors (15707307).

61305013 is a wasteful number, since it uses less digits than its factorization.

61305013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72408 (or 72397 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 61305013 is about 7829.7517840606. The cubic root of 61305013 is about 394.3047386013.

Adding to 61305013 its reverse (31050316), we get a palindrome (92355329).

The spelling of 61305013 in words is "sixty-one million, three hundred five thousand, thirteen".