205701047 has 4 divisors (see below), whose sum is σ = 207271416. Its totient is φ = 204130680.

The previous prime is 205701007. The next prime is 205701053. The reversal of 205701047 is 740107502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740107502 = 2 ⋅370053751.

It is a cyclic number.

It is not a de Polignac number, because 205701047 - 2²² = 201506743 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 (205701007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784988 + ... + 785249.

It is an arithmetic number, because the mean of its divisors is an integer number (51817854).

Almost surely, 2^205701047 is an apocalyptic number.

205701047 is a deficient number, since it is larger than the sum of its proper divisors (1570369).

205701047 is a wasteful number, since it uses less digits than its factorization.

205701047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570368.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 205701047 is about 14342.2817919604. The cubic root of 205701047 is about 590.3082244725.

Adding to 205701047 its reverse (740107502), we get a palindrome (945808549).

The spelling of 205701047 in words is "two hundred five million, seven hundred one thousand, forty-seven".