61606819 has 2 divisors, whose sum is σ = 61606820. Its totient is φ = 61606818.

The previous prime is 61606777. The next prime is 61606823. The reversal of 61606819 is 91860616.

61606819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61606819 - 2¹¹ = 61604771 is a prime.

It is a super-2 number, since 2×61606819² = 7590800294597522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61606849) 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, 30803409 + 30803410.

It is an arithmetic number, because the mean of its divisors is an integer number (30803410).

Almost surely, 2^61606819 is an apocalyptic number.

61606819 is a deficient number, since it is larger than the sum of its proper divisors (1).

61606819 is an equidigital number, since it uses as much as digits as its factorization.

61606819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 61606819 is about 7849.0011466428. The cubic root of 61606819 is about 394.9507367928.

The spelling of 61606819 in words is "sixty-one million, six hundred six thousand, eight hundred nineteen".