868769261 has 2 divisors, whose sum is σ = 868769262. Its totient is φ = 868769260.

The previous prime is 868769257. The next prime is 868769263. The reversal of 868769261 is 162967868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725224900 + 143544361 = 26930^2 + 11981^2 .

It is a cyclic number.

It is not a de Polignac number, because 868769261 - 2² = 868769257 is a prime.

It is a super-2 number, since 2×868769261² = 1509520057716972242, which contains 22 as substring.

Together with 868769263, 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 (868769263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434384630 + 434384631.

It is an arithmetic number, because the mean of its divisors is an integer number (434384631).

Almost surely, 2^868769261 is an apocalyptic number.

It is an amenable number.

868769261 is a deficient number, since it is larger than the sum of its proper divisors (1).

868769261 is an equidigital number, since it uses as much as digits as its factorization.

868769261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 868769261 is about 29474.8920439075. The cubic root of 868769261 is about 954.1899002557.

The spelling of 868769261 in words is "eight hundred sixty-eight million, seven hundred sixty-nine thousand, two hundred sixty-one".