623065217 has 4 divisors (see below), whose sum is σ = 623134020. Its totient is φ = 622996416.

The previous prime is 623065211. The next prime is 623065243. The reversal of 623065217 is 712560326.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 213043216 + 410022001 = 14596^2 + 20249^2 .

It is a cyclic number.

It is not a de Polignac number, because 623065217 - 2¹⁶ = 622999681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623065211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18308 + ... + 39765.

It is an arithmetic number, because the mean of its divisors is an integer number (155783505).

Almost surely, 2^623065217 is an apocalyptic number.

It is an amenable number.

623065217 is a deficient number, since it is larger than the sum of its proper divisors (68803).

623065217 is a wasteful number, since it uses less digits than its factorization.

623065217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68802.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 623065217 is about 24961.2743464752. The cubic root of 623065217 is about 854.1048127531.

The spelling of 623065217 in words is "six hundred twenty-three million, sixty-five thousand, two hundred seventeen".