61736513 has 2 divisors, whose sum is σ = 61736514. Its totient is φ = 61736512.

The previous prime is 61736497. The next prime is 61736581. The reversal of 61736513 is 31563716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 7463824 = 7367^2 + 2732^2 .

It is a cyclic number.

It is not a de Polignac number, because 61736513 - 2⁴ = 61736497 is a prime.

It is a super-2 number, since 2×61736513² = 7622794074798338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61736513.

It is not a weakly prime, because it can be changed into another prime (61726513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30868256 + 30868257.

It is an arithmetic number, because the mean of its divisors is an integer number (30868257).

Almost surely, 2^61736513 is an apocalyptic number.

It is an amenable number.

61736513 is a deficient number, since it is larger than the sum of its proper divisors (1).

61736513 is an equidigital number, since it uses as much as digits as its factorization.

61736513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 61736513 is about 7857.2586186277. The cubic root of 61736513 is about 395.2276911903.

The spelling of 61736513 in words is "sixty-one million, seven hundred thirty-six thousand, five hundred thirteen".