1071085777 has 2 divisors, whose sum is σ = 1071085778. Its totient is φ = 1071085776.

The previous prime is 1071085759. The next prime is 1071085787. The reversal of 1071085777 is 7775801701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 820306881 + 250778896 = 28641^2 + 15836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071085777 is a prime.

It is a super-2 number, since 2×1071085777² = 2294449483383387458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1071085787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535542888 + 535542889.

It is an arithmetic number, because the mean of its divisors is an integer number (535542889).

Almost surely, 2^1071085777 is an apocalyptic number.

It is an amenable number.

1071085777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071085777 is an equidigital number, since it uses as much as digits as its factorization.

1071085777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96040, while the sum is 43.

The square root of 1071085777 is about 32727.4468451176. The cubic root of 1071085777 is about 1023.1549682470.

The spelling of 1071085777 in words is "one billion, seventy-one million, eighty-five thousand, seven hundred seventy-seven".