1623173 has 2 divisors, whose sum is σ = 1623174. Its totient is φ = 1623172.

The previous prime is 1623169. The next prime is 1623197. The reversal of 1623173 is 3713261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 293764 = 1153^2 + 542^2 .

It is an emirp because it is prime and its reverse (3713261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1623173 - 2² = 1623169 is a prime.

It is equal to p₁₂₂₇₆₅ and since 1623173 and 122765 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811586 + 811587.

It is an arithmetic number, because the mean of its divisors is an integer number (811587).

2^1623173 is an apocalyptic number.

It is an amenable number.

1623173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623173 is an equidigital number, since it uses as much as digits as its factorization.

1623173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 23.

The square root of 1623173 is about 1274.0380685050. The cubic root of 1623173 is about 117.5226574686.

The spelling of 1623173 in words is "one million, six hundred twenty-three thousand, one hundred seventy-three".