61776223 has 2 divisors, whose sum is σ = 61776224. Its totient is φ = 61776222.

The previous prime is 61776191. The next prime is 61776227. The reversal of 61776223 is 32267716.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61776223 - 2⁵ = 61776191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61776227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30888111 + 30888112.

It is an arithmetic number, because the mean of its divisors is an integer number (30888112).

Almost surely, 2^61776223 is an apocalyptic number.

61776223 is a deficient number, since it is larger than the sum of its proper divisors (1).

61776223 is an equidigital number, since it uses as much as digits as its factorization.

61776223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 61776223 is about 7859.7851751813. The cubic root of 61776223 is about 395.3124121389.

The spelling of 61776223 in words is "sixty-one million, seven hundred seventy-six thousand, two hundred twenty-three".