61996513 has 2 divisors, whose sum is σ = 61996514. Its totient is φ = 61996512.

The previous prime is 61996511. The next prime is 61996537. The reversal of 61996513 is 31569916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61826769 + 169744 = 7863^2 + 412^2 .

It is a cyclic number.

It is not a de Polignac number, because 61996513 - 2¹ = 61996511 is a prime.

Together with 61996511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61996511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30998256 + 30998257.

It is an arithmetic number, because the mean of its divisors is an integer number (30998257).

Almost surely, 2^61996513 is an apocalyptic number.

It is an amenable number.

61996513 is a deficient number, since it is larger than the sum of its proper divisors (1).

61996513 is an equidigital number, since it uses as much as digits as its factorization.

61996513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 40.

The square root of 61996513 is about 7873.7864461770. The cubic root of 61996513 is about 395.7817408461.

The spelling of 61996513 in words is "sixty-one million, nine hundred ninety-six thousand, five hundred thirteen".