623699 has 2 divisors, whose sum is σ = 623700. Its totient is φ = 623698.

The previous prime is 623683. The next prime is 623717. The reversal of 623699 is 996326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623699 - 2⁴ = 623683 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6³ + 2¹⁵ + 6³ + 3¹² + 9 + 9⁵ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623699.

It is not a weakly prime, because it can be changed into another prime (623669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311849 + 311850.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

2⁶²³⁶⁹⁹ is an apocalyptic number.

623699 is a deficient number, since it is larger than the sum of its proper divisors (1).

623699 is an equidigital number, since it uses as much as digits as its factorization.

623699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 35.

The square root of 623699 is about 789.7461617507. The cubic root of 623699 is about 85.4394313572.

The spelling of 623699 in words is "six hundred twenty-three thousand, six hundred ninety-nine".