61912229 has 2 divisors, whose sum is σ = 61912230. Its totient is φ = 61912228.

The previous prime is 61912219. The next prime is 61912237. The reversal of 61912229 is 92221916.

61912229 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 can be written as a sum of positive squares in only one way, i.e., 44289025 + 17623204 = 6655^2 + 4198^2 .

It is a cyclic number.

It is not a de Polignac number, because 61912229 - 2⁸ = 61911973 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61912195 and 61912204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61912219) 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, 30956114 + 30956115.

It is an arithmetic number, because the mean of its divisors is an integer number (30956115).

Almost surely, 2^61912229 is an apocalyptic number.

It is an amenable number.

61912229 is a deficient number, since it is larger than the sum of its proper divisors (1).

61912229 is an equidigital number, since it uses as much as digits as its factorization.

61912229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 32.

The square root of 61912229 is about 7868.4324360066. The cubic root of 61912229 is about 395.6023049672.

The spelling of 61912229 in words is "sixty-one million, nine hundred twelve thousand, two hundred twenty-nine".