61100089 has 2 divisors, whose sum is σ = 61100090. Its totient is φ = 61100088.

The previous prime is 61100077. The next prime is 61100093. The reversal of 61100089 is 98000116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 4549689 = 7520^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 61100089 - 2²³ = 52711481 is a prime.

It is not a weakly prime, because it can be changed into another prime (61100069) 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, 30550044 + 30550045.

It is an arithmetic number, because the mean of its divisors is an integer number (30550045).

Almost surely, 2^61100089 is an apocalyptic number.

It is an amenable number.

61100089 is a deficient number, since it is larger than the sum of its proper divisors (1).

61100089 is an equidigital number, since it uses as much as digits as its factorization.

61100089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 61100089 is about 7816.6545913197. The cubic root of 61100089 is about 393.8649012450.

The spelling of 61100089 in words is "sixty-one million, one hundred thousand, eighty-nine".