61408619 has 2 divisors, whose sum is σ = 61408620. Its totient is φ = 61408618.

The previous prime is 61408591. The next prime is 61408661. The reversal of 61408619 is 91680416.

61408619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61408619 - 2⁸ = 61408363 is a prime.

It is a super-2 number, since 2×61408619² = 7542036974974322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61408679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30704309 + 30704310.

It is an arithmetic number, because the mean of its divisors is an integer number (30704310).

Almost surely, 2^61408619 is an apocalyptic number.

61408619 is a deficient number, since it is larger than the sum of its proper divisors (1).

61408619 is an equidigital number, since it uses as much as digits as its factorization.

61408619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 61408619 is about 7836.3651650494. The cubic root of 61408619 is about 394.5267397218.

The spelling of 61408619 in words is "sixty-one million, four hundred eight thousand, six hundred nineteen".