854780261 has 2 divisors, whose sum is σ = 854780262. Its totient is φ = 854780260.

The previous prime is 854780243. The next prime is 854780263. The reversal of 854780261 is 162087458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841348036 + 13432225 = 29006^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 854780261 - 2²⁶ = 787671397 is a prime.

Together with 854780263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854780263) 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 as a sum of consecutive naturals, namely, 427390130 + 427390131.

It is an arithmetic number, because the mean of its divisors is an integer number (427390131).

Almost surely, 2^854780261 is an apocalyptic number.

It is an amenable number.

854780261 is a deficient number, since it is larger than the sum of its proper divisors (1).

854780261 is an equidigital number, since it uses as much as digits as its factorization.

854780261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 854780261 is about 29236.6253353563. The cubic root of 854780261 is about 949.0406792385.

The spelling of 854780261 in words is "eight hundred fifty-four million, seven hundred eighty thousand, two hundred sixty-one".