8781290869 has 6 divisors (see below), whose sum is σ = 9508735266. Its totient is φ = 8105806800.

The previous prime is 8781290851. The next prime is 8781290887. The reversal of 8781290869 is 9680921878.

It is an interprime number because it is at equal distance from previous prime (8781290851) and next prime (8781290887).

It can be written as a sum of positive squares in 3 ways, for example, as 628103844 + 8153187025 = 25062^2 + 90295^2 .

It is not a de Polignac number, because 8781290869 - 2¹¹ = 8781288821 is a prime.

It is a super-2 number, since 2×8781290869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8781296869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25979982 + ... + 25980319.

It is an arithmetic number, because the mean of its divisors is an integer number (1584789211).

Almost surely, 2^8781290869 is an apocalyptic number.

It is an amenable number.

8781290869 is a deficient number, since it is larger than the sum of its proper divisors (727444397).

8781290869 is a wasteful number, since it uses less digits than its factorization.

8781290869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51960327 (or 51960314 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The square root of 8781290869 is about 93708.5421346421. The cubic root of 8781290869 is about 2063.0960819079.

The spelling of 8781290869 in words is "eight billion, seven hundred eighty-one million, two hundred ninety thousand, eight hundred sixty-nine".