61869589 has 2 divisors, whose sum is σ = 61869590. Its totient is φ = 61869588.

The previous prime is 61869569. The next prime is 61869593. The reversal of 61869589 is 98596816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 12659364 = 7015^2 + 3558^2 .

It is a cyclic number.

It is not a de Polignac number, because 61869589 - 2¹⁷ = 61738517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61869539) 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, 30934794 + 30934795.

It is an arithmetic number, because the mean of its divisors is an integer number (30934795).

Almost surely, 2^61869589 is an apocalyptic number.

It is an amenable number.

61869589 is a deficient number, since it is larger than the sum of its proper divisors (1).

61869589 is an equidigital number, since it uses as much as digits as its factorization.

61869589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 61869589 is about 7865.7224080182. The cubic root of 61869589 is about 395.5114647753.

It can be divided in two parts, 618 and 69589, that added together give a palindrome (70207).

The spelling of 61869589 in words is "sixty-one million, eight hundred sixty-nine thousand, five hundred eighty-nine".