623169 has 12 divisors (see below), whose sum is σ = 953316. Its totient is φ = 390912.

The previous prime is 623107. The next prime is 623171. The reversal of 623169 is 961326.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 263169 + 360000 = 513^2 + 600^2 .

It is not a de Polignac number, because 623169 - 2⁷ = 623041 is a prime.

It is a super-2 number, since 2×623169² = 776679205122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (623269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1884 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (79443).

2⁶²³¹⁶⁹ is an apocalyptic number.

It is an amenable number.

623169 is a deficient number, since it is larger than the sum of its proper divisors (330147).

623169 is a wasteful number, since it uses less digits than its factorization.

623169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096 (or 4093 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 623169 is about 789.4105395800. The cubic root of 623169 is about 85.4152232422.

The spelling of 623169 in words is "six hundred twenty-three thousand, one hundred sixty-nine".