61358449 has 2 divisors, whose sum is σ = 61358450. Its totient is φ = 61358448.

The previous prime is 61358447. The next prime is 61358459. The reversal of 61358449 is 94485316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 18225 = 7832^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 61358449 - 2¹ = 61358447 is a prime.

Together with 61358447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61358441) 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, 30679224 + 30679225.

It is an arithmetic number, because the mean of its divisors is an integer number (30679225).

Almost surely, 2^61358449 is an apocalyptic number.

It is an amenable number.

61358449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61358449 is an equidigital number, since it uses as much as digits as its factorization.

61358449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 61358449 is about 7833.1634095045. The cubic root of 61358449 is about 394.4192694697.

The spelling of 61358449 in words is "sixty-one million, three hundred fifty-eight thousand, four hundred forty-nine".