205379623 has 4 divisors (see below), whose sum is σ = 206048920. Its totient is φ = 204710328.

The previous prime is 205379579. The next prime is 205379639. The reversal of 205379623 is 326973502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326973502 = 2 ⋅163486751.

It is a cyclic number.

It is not a de Polignac number, because 205379623 - 2¹³ = 205371431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205379323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334188 + ... + 334801.

It is an arithmetic number, because the mean of its divisors is an integer number (51512230).

Almost surely, 2^205379623 is an apocalyptic number.

205379623 is a deficient number, since it is larger than the sum of its proper divisors (669297).

205379623 is an equidigital number, since it uses as much as digits as its factorization.

205379623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669296.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 205379623 is about 14331.0719417635. The cubic root of 205379623 is about 590.0005965713. Note that the first 3 decimals are identical.

The spelling of 205379623 in words is "two hundred five million, three hundred seventy-nine thousand, six hundred twenty-three".