172782223 has 2 divisors, whose sum is σ = 172782224. Its totient is φ = 172782222.

The previous prime is 172782157. The next prime is 172782287. The reversal of 172782223 is 322287271.

It is a happy number.

172782223 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 an emirp because it is prime and its reverse (322287271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172782223 - 2⁹ = 172781711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172782023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86391111 + 86391112.

It is an arithmetic number, because the mean of its divisors is an integer number (86391112).

Almost surely, 2^172782223 is an apocalyptic number.

172782223 is a deficient number, since it is larger than the sum of its proper divisors (1).

172782223 is an equidigital number, since it uses as much as digits as its factorization.

172782223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 172782223 is about 13144.6651916281. The cubic root of 172782223 is about 556.9715590256.

The spelling of 172782223 in words is "one hundred seventy-two million, seven hundred eighty-two thousand, two hundred twenty-three".