842770069 has 2 divisors, whose sum is σ = 842770070. Its totient is φ = 842770068.

The previous prime is 842770057. The next prime is 842770079. The reversal of 842770069 is 960077248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438357969 + 404412100 = 20937^2 + 20110^2 .

It is a cyclic number.

It is not a de Polignac number, because 842770069 - 2⁵ = 842770037 is a prime.

It is a super-2 number, since 2×842770069² = 1420522778404529522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842770039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421385034 + 421385035.

It is an arithmetic number, because the mean of its divisors is an integer number (421385035).

Almost surely, 2^842770069 is an apocalyptic number.

It is an amenable number.

842770069 is a deficient number, since it is larger than the sum of its proper divisors (1).

842770069 is an equidigital number, since it uses as much as digits as its factorization.

842770069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 842770069 is about 29030.5023897279. The cubic root of 842770069 is about 944.5748277259.

The spelling of 842770069 in words is "eight hundred forty-two million, seven hundred seventy thousand, sixty-nine".