849776869 has 2 divisors, whose sum is σ = 849776870. Its totient is φ = 849776868.

The previous prime is 849776831. The next prime is 849776897. The reversal of 849776869 is 968677948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841580100 + 8196769 = 29010^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 849776869 - 2²⁵ = 816222437 is a prime.

It is a super-2 number, since 2×849776869² = 1444241454174886322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 849776869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849776069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424888434 + 424888435.

It is an arithmetic number, because the mean of its divisors is an integer number (424888435).

Almost surely, 2^849776869 is an apocalyptic number.

It is an amenable number.

849776869 is a deficient number, since it is larger than the sum of its proper divisors (1).

849776869 is an equidigital number, since it uses as much as digits as its factorization.

849776869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 64.

The square root of 849776869 is about 29150.9325579817. The cubic root of 849776869 is about 947.1853417323.

The spelling of 849776869 in words is "eight hundred forty-nine million, seven hundred seventy-six thousand, eight hundred sixty-nine".