61539593 has 2 divisors, whose sum is σ = 61539594. Its totient is φ = 61539592.

The previous prime is 61539589. The next prime is 61539607. The reversal of 61539593 is 39593516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51222649 + 10316944 = 7157^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 61539593 - 2² = 61539589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61539593.

It is not a weakly prime, because it can be changed into another prime (61539503) 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, 30769796 + 30769797.

It is an arithmetic number, because the mean of its divisors is an integer number (30769797).

Almost surely, 2^61539593 is an apocalyptic number.

It is an amenable number.

61539593 is a deficient number, since it is larger than the sum of its proper divisors (1).

61539593 is an equidigital number, since it uses as much as digits as its factorization.

61539593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109350, while the sum is 41.

The square root of 61539593 is about 7844.7175220017. The cubic root of 61539593 is about 394.8070263936.

The spelling of 61539593 in words is "sixty-one million, five hundred thirty-nine thousand, five hundred ninety-three".