61967513 has 2 divisors, whose sum is σ = 61967514. Its totient is φ = 61967512.

The previous prime is 61967509. The next prime is 61967539. The reversal of 61967513 is 31576916.

61967513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46063369 + 15904144 = 6787^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 61967513 - 2² = 61967509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61967813) 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, 30983756 + 30983757.

It is an arithmetic number, because the mean of its divisors is an integer number (30983757).

Almost surely, 2^61967513 is an apocalyptic number.

It is an amenable number.

61967513 is a deficient number, since it is larger than the sum of its proper divisors (1).

61967513 is an equidigital number, since it uses as much as digits as its factorization.

61967513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 61967513 is about 7871.9446771430. The cubic root of 61967513 is about 395.7200198448.

The spelling of 61967513 in words is "sixty-one million, nine hundred sixty-seven thousand, five hundred thirteen".