61089601 has 2 divisors, whose sum is σ = 61089602. Its totient is φ = 61089600.

The previous prime is 61089599. The next prime is 61089647. The reversal of 61089601 is 10698016.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61074225 + 15376 = 7815^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 61089601 - 2¹ = 61089599 is a prime.

Together with 61089599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61089661) 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, 30544800 + 30544801.

It is an arithmetic number, because the mean of its divisors is an integer number (30544801).

Almost surely, 2^61089601 is an apocalyptic number.

It is an amenable number.

61089601 is a deficient number, since it is larger than the sum of its proper divisors (1).

61089601 is an equidigital number, since it uses as much as digits as its factorization.

61089601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 61089601 is about 7815.9836872911. The cubic root of 61089601 is about 393.8423639539.

The spelling of 61089601 in words is "sixty-one million, eighty-nine thousand, six hundred one".