61012513 has 2 divisors, whose sum is σ = 61012514. Its totient is φ = 61012512.

The previous prime is 61012499. The next prime is 61012517. The reversal of 61012513 is 31521016.

61012513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42419169 + 18593344 = 6513^2 + 4312^2 .

It is a cyclic number.

It is not a de Polignac number, because 61012513 - 2⁵ = 61012481 is a prime.

It is not a weakly prime, because it can be changed into another prime (61012517) 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 as a sum of consecutive naturals, namely, 30506256 + 30506257.

It is an arithmetic number, because the mean of its divisors is an integer number (30506257).

Almost surely, 2^61012513 is an apocalyptic number.

It is an amenable number.

61012513 is a deficient number, since it is larger than the sum of its proper divisors (1).

61012513 is an equidigital number, since it uses as much as digits as its factorization.

61012513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61012513 is about 7811.0506975694. The cubic root of 61012513 is about 393.6766330761.

Adding to 61012513 its reverse (31521016), we get a palindrome (92533529).

The spelling of 61012513 in words is "sixty-one million, twelve thousand, five hundred thirteen".