8540669 has 4 divisors (see below), whose sum is σ = 8749020. Its totient is φ = 8332320.

The previous prime is 8540639. The next prime is 8540683. The reversal of 8540669 is 9660458.

8540669 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9660458 = 2 ⋅4830229.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 6175225 = 1538^2 + 2485^2 .

It is a cyclic number.

It is not a de Polignac number, because 8540669 - 2¹² = 8536573 is a prime.

It is a super-2 number, since 2×8540669² = 145886053935122, which 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 (8540629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104114 + ... + 104195.

It is an arithmetic number, because the mean of its divisors is an integer number (2187255).

Almost surely, 2^8540669 is an apocalyptic number.

It is an amenable number.

8540669 is a deficient number, since it is larger than the sum of its proper divisors (208351).

8540669 is a wasteful number, since it uses less digits than its factorization.

8540669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208350.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 8540669 is about 2922.4423005425. The cubic root of 8540669 is about 204.4077213521.

The spelling of 8540669 in words is "eight million, five hundred forty thousand, six hundred sixty-nine".