1723420357 has 2 divisors, whose sum is σ = 1723420358. Its totient is φ = 1723420356.

The previous prime is 1723420351. The next prime is 1723420367. The reversal of 1723420357 is 7530243271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1658036961 + 65383396 = 40719^2 + 8086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1723420357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1723420351) 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, 861710178 + 861710179.

It is an arithmetic number, because the mean of its divisors is an integer number (861710179).

Almost surely, 2^1723420357 is an apocalyptic number.

It is an amenable number.

1723420357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723420357 is an equidigital number, since it uses as much as digits as its factorization.

1723420357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 1723420357 is about 41514.0982920260. The cubic root of 1723420357 is about 1198.9389595579.

The spelling of 1723420357 in words is "one billion, seven hundred twenty-three million, four hundred twenty thousand, three hundred fifty-seven".