205929491 has 2 divisors, whose sum is σ = 205929492. Its totient is φ = 205929490.

The previous prime is 205929481. The next prime is 205929533. The reversal of 205929491 is 194929502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205929491 - 2¹⁴ = 205913107 is a prime.

It is not a weakly prime, because it can be changed into another prime (205929401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102964745 + 102964746.

It is an arithmetic number, because the mean of its divisors is an integer number (102964746).

Almost surely, 2^205929491 is an apocalyptic number.

205929491 is a deficient number, since it is larger than the sum of its proper divisors (1).

205929491 is an equidigital number, since it uses as much as digits as its factorization.

205929491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 205929491 is about 14350.2435867828. The cubic root of 205929491 is about 590.5266684783.

The spelling of 205929491 in words is "two hundred five million, nine hundred twenty-nine thousand, four hundred ninety-one".