61135589 has 2 divisors, whose sum is σ = 61135590. Its totient is φ = 61135588.

The previous prime is 61135583. The next prime is 61135631. The reversal of 61135589 is 98553116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57002500 + 4133089 = 7550^2 + 2033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61135589 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61135583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30567794 + 30567795.

It is an arithmetic number, because the mean of its divisors is an integer number (30567795).

Almost surely, 2^61135589 is an apocalyptic number.

It is an amenable number.

61135589 is a deficient number, since it is larger than the sum of its proper divisors (1).

61135589 is an equidigital number, since it uses as much as digits as its factorization.

61135589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 61135589 is about 7818.9250539956. The cubic root of 61135589 is about 393.9411668017.

The spelling of 61135589 in words is "sixty-one million, one hundred thirty-five thousand, five hundred eighty-nine".