1722923 has 2 divisors, whose sum is σ = 1722924. Its totient is φ = 1722922.

The previous prime is 1722893. The next prime is 1722937. The reversal of 1722923 is 3292271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1722923 - 2⁸ = 1722667 is a prime.

It is equal to p₁₂₉₇₂₅ and since 1722923 and 129725 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1722892 and 1722901.

It is not a weakly prime, because it can be changed into another prime (1722983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861461 + 861462.

It is an arithmetic number, because the mean of its divisors is an integer number (861462).

2^1722923 is an apocalyptic number.

1722923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722923 is an equidigital number, since it uses as much as digits as its factorization.

1722923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 1722923 is about 1312.6016151140. The cubic root of 1722923 is about 119.8823615662.

The spelling of 1722923 in words is "one million, seven hundred twenty-two thousand, nine hundred twenty-three".