61546489 has 2 divisors, whose sum is σ = 61546490. Its totient is φ = 61546488.

The previous prime is 61546487. The next prime is 61546549. The reversal of 61546489 is 98464516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 18774889 = 6540^2 + 4333^2 .

It is a cyclic number.

It is not a de Polignac number, because 61546489 - 2¹ = 61546487 is a prime.

Together with 61546487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61546487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30773244 + 30773245.

It is an arithmetic number, because the mean of its divisors is an integer number (30773245).

Almost surely, 2^61546489 is an apocalyptic number.

It is an amenable number.

61546489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61546489 is an equidigital number, since it uses as much as digits as its factorization.

61546489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 61546489 is about 7845.1570411305. The cubic root of 61546489 is about 394.8217729301.

The spelling of 61546489 in words is "sixty-one million, five hundred forty-six thousand, four hundred eighty-nine".