205513079 has 2 divisors, whose sum is σ = 205513080. Its totient is φ = 205513078.

The previous prime is 205513067. The next prime is 205513097. The reversal of 205513079 is 970315502.

Together with next prime (205513097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205513079 - 2¹² = 205508983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205513019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102756539 + 102756540.

It is an arithmetic number, because the mean of its divisors is an integer number (102756540).

Almost surely, 2^205513079 is an apocalyptic number.

205513079 is a deficient number, since it is larger than the sum of its proper divisors (1).

205513079 is an equidigital number, since it uses as much as digits as its factorization.

205513079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 205513079 is about 14335.7273620839. The cubic root of 205513079 is about 590.1283633375.

The spelling of 205513079 in words is "two hundred five million, five hundred thirteen thousand, seventy-nine".