260847977 has 4 divisors (see below), whose sum is σ = 280913220. Its totient is φ = 240782736.

The previous prime is 260847973. The next prime is 260847989. The reversal of 260847977 is 779748062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779748062 = 2 ⋅389874031.

It can be written as a sum of positive squares in 2 ways, for example, as 46840336 + 214007641 = 6844^2 + 14629^2 .

It is a cyclic number.

It is not a de Polignac number, because 260847977 - 2² = 260847973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260847973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10032602 + ... + 10032627.

It is an arithmetic number, because the mean of its divisors is an integer number (70228305).

Almost surely, 2^260847977 is an apocalyptic number.

It is an amenable number.

260847977 is a deficient number, since it is larger than the sum of its proper divisors (20065243).

260847977 is a wasteful number, since it uses less digits than its factorization.

260847977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20065242.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The square root of 260847977 is about 16150.7887423494. The cubic root of 260847977 is about 638.9435508596.

The spelling of 260847977 in words is "two hundred sixty million, eight hundred forty-seven thousand, nine hundred seventy-seven".