869278469 has 2 divisors, whose sum is σ = 869278470. Its totient is φ = 869278468.

The previous prime is 869278439. The next prime is 869278499. The reversal of 869278469 is 964872968.

It is a balanced prime because it is at equal distance from previous prime (869278439) and next prime (869278499).

It can be written as a sum of positive squares in only one way, i.e., 810142369 + 59136100 = 28463^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 869278469 - 2²⁰ = 868229893 is a prime.

It is a super-2 number, since 2×869278469² = 1511290113333967922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869278429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434639234 + 434639235.

It is an arithmetic number, because the mean of its divisors is an integer number (434639235).

Almost surely, 2^869278469 is an apocalyptic number.

It is an amenable number.

869278469 is a deficient number, since it is larger than the sum of its proper divisors (1).

869278469 is an equidigital number, since it uses as much as digits as its factorization.

869278469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The square root of 869278469 is about 29483.5287745548. The cubic root of 869278469 is about 954.3762889223.

The spelling of 869278469 in words is "eight hundred sixty-nine million, two hundred seventy-eight thousand, four hundred sixty-nine".