205740477 has 12 divisors (see below), whose sum is σ = 314662140. Its totient is φ = 129091968.

The previous prime is 205740467. The next prime is 205740487. The reversal of 205740477 is 774047502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (205740467) and next prime (205740487).

It can be written as a sum of positive squares in 2 ways, for example, as 132227001 + 73513476 = 11499^2 + 8574^2 .

It is not a de Polignac number, because 205740477 - 2¹⁰ = 205739453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205740407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672202 + ... + 672507.

It is an arithmetic number, because the mean of its divisors is an integer number (26221845).

Almost surely, 2^205740477 is an apocalyptic number.

It is an amenable number.

205740477 is a deficient number, since it is larger than the sum of its proper divisors (108921663).

205740477 is a wasteful number, since it uses less digits than its factorization.

205740477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344732 (or 1344729 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 205740477 is about 14343.6563330275. The cubic root of 205740477 is about 590.3459399931.

Adding to 205740477 its reverse (774047502), we get a palindrome (979787979).

The spelling of 205740477 in words is "two hundred five million, seven hundred forty thousand, four hundred seventy-seven".