61613013 has 32 divisors (see below), whose sum is σ = 103403520. Its totient is φ = 31700160.

The previous prime is 61613011. The next prime is 61613017. The reversal of 61613013 is 31031616.

It is not a de Polignac number, because 61613013 - 2¹ = 61613011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61613011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23956 + ... + 26402.

It is an arithmetic number, because the mean of its divisors is an integer number (3231360).

Almost surely, 2^61613013 is an apocalyptic number.

It is an amenable number.

61613013 is a deficient number, since it is larger than the sum of its proper divisors (41790507).

61613013 is a wasteful number, since it uses less digits than its factorization.

61613013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 61613013 is about 7849.3957092250. The cubic root of 61613013 is about 394.9639725727.

Adding to 61613013 its reverse (31031616), we get a palindrome (92644629).

The spelling of 61613013 in words is "sixty-one million, six hundred thirteen thousand, thirteen".