205623039 has 8 divisors (see below), whose sum is σ = 274888960. Its totient is φ = 136719576.

The previous prime is 205622999. The next prime is 205623107. The reversal of 205623039 is 930326502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205623039 - 2¹⁶ = 205557503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205622997 and 205623015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205623139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89287 + ... + 91560.

It is an arithmetic number, because the mean of its divisors is an integer number (34361120).

Almost surely, 2^205623039 is an apocalyptic number.

205623039 is a deficient number, since it is larger than the sum of its proper divisors (69265921).

205623039 is a wasteful number, since it uses less digits than its factorization.

205623039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181229.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 205623039 is about 14339.5620226003. The cubic root of 205623039 is about 590.2335941827.

The spelling of 205623039 in words is "two hundred five million, six hundred twenty-three thousand, thirty-nine".