623602109 has 16 divisors (see below), whose sum is σ = 735603120. Its totient is φ = 523084800.

The previous prime is 623602079. The next prime is 623602127. The reversal of 623602109 is 901206326.

It can be written as a sum of positive squares in 8 ways, for example, as 95981209 + 527620900 = 9797^2 + 22970^2 .

It is a cyclic number.

It is not a de Polignac number, because 623602109 - 2²⁸ = 355166653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623602009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42242 + ... + 55059.

It is an arithmetic number, because the mean of its divisors is an integer number (45975195).

Almost surely, 2^623602109 is an apocalyptic number.

It is an amenable number.

623602109 is a deficient number, since it is larger than the sum of its proper divisors (112001011).

623602109 is a wasteful number, since it uses less digits than its factorization.

623602109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97360.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 623602109 is about 24972.0265296992. The cubic root of 623602109 is about 854.3500681871.

The spelling of 623602109 in words is "six hundred twenty-three million, six hundred two thousand, one hundred nine".