205412349 has 4 divisors (see below), whose sum is σ = 273883136. Its totient is φ = 136941564.

The previous prime is 205412321. The next prime is 205412357. The reversal of 205412349 is 943214502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205412349 - 2²¹ = 203315197 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 (205412359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34235389 + ... + 34235394.

It is an arithmetic number, because the mean of its divisors is an integer number (68470784).

Almost surely, 2^205412349 is an apocalyptic number.

It is an amenable number.

205412349 is a deficient number, since it is larger than the sum of its proper divisors (68470787).

205412349 is an equidigital number, since it uses as much as digits as its factorization.

205412349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68470786.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 205412349 is about 14332.2136810752. The cubic root of 205412349 is about 590.0319325817.

It can be divided in two parts, 205412 and 349, that added together give a triangular number (205761 = T₆₄₁).

The spelling of 205412349 in words is "two hundred five million, four hundred twelve thousand, three hundred forty-nine".