61257589 has 2 divisors, whose sum is σ = 61257590. Its totient is φ = 61257588.

The previous prime is 61257583. The next prime is 61257601. The reversal of 61257589 is 98575216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61105489 + 152100 = 7817^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 61257589 - 2⁷ = 61257461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61257583) 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, 30628794 + 30628795.

It is an arithmetic number, because the mean of its divisors is an integer number (30628795).

Almost surely, 2^61257589 is an apocalyptic number.

It is an amenable number.

61257589 is a deficient number, since it is larger than the sum of its proper divisors (1).

61257589 is an equidigital number, since it uses as much as digits as its factorization.

61257589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 61257589 is about 7826.7227496571. The cubic root of 61257589 is about 394.2030376642.

The spelling of 61257589 in words is "sixty-one million, two hundred fifty-seven thousand, five hundred eighty-nine".