61159789 has 2 divisors, whose sum is σ = 61159790. Its totient is φ = 61159788.

The previous prime is 61159729. The next prime is 61159817. The reversal of 61159789 is 98795116.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44488900 + 16670889 = 6670^2 + 4083^2 .

It is a cyclic number.

It is not a de Polignac number, because 61159789 - 2¹¹ = 61157741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61159729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30579894 + 30579895.

It is an arithmetic number, because the mean of its divisors is an integer number (30579895).

Almost surely, 2^61159789 is an apocalyptic number.

It is an amenable number.

61159789 is a deficient number, since it is larger than the sum of its proper divisors (1).

61159789 is an equidigital number, since it uses as much as digits as its factorization.

61159789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 46.

The square root of 61159789 is about 7820.4724281849. The cubic root of 61159789 is about 393.9931393585.

The spelling of 61159789 in words is "sixty-one million, one hundred fifty-nine thousand, seven hundred eighty-nine".