205979425 has 6 divisors (see below), whose sum is σ = 255414518. Its totient is φ = 164783520.

The previous prime is 205979419. The next prime is 205979453. The reversal of 205979425 is 524979502.

It can be written as a sum of positive squares in 3 ways, for example, as 28224 + 205951201 = 168^2 + 14351^2 .

It is not a de Polignac number, because 205979425 - 2⁵ = 205979393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4119564 + ... + 4119613.

Almost surely, 2^205979425 is an apocalyptic number.

205979425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205979425 is a deficient number, since it is larger than the sum of its proper divisors (49435093).

205979425 is an equidigital number, since it uses as much as digits as its factorization.

205979425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239187 (or 8239182 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 205979425 is about 14351.9833124206. The cubic root of 205979425 is about 590.5743951305.

The spelling of 205979425 in words is "two hundred five million, nine hundred seventy-nine thousand, four hundred twenty-five".