1723420057 has 2 divisors, whose sum is σ = 1723420058. Its totient is φ = 1723420056.

The previous prime is 1723419977. The next prime is 1723420073. The reversal of 1723420057 is 7500243271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1041740176 + 681679881 = 32276^2 + 26109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1723420057 - 2²³ = 1715031449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1723420357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861710028 + 861710029.

It is an arithmetic number, because the mean of its divisors is an integer number (861710029).

Almost surely, 2^1723420057 is an apocalyptic number.

It is an amenable number.

1723420057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723420057 is an equidigital number, since it uses as much as digits as its factorization.

1723420057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1723420057 is about 41514.0946787955. The cubic root of 1723420057 is about 1198.9388899904.

The spelling of 1723420057 in words is "one billion, seven hundred twenty-three million, four hundred twenty thousand, fifty-seven".