7869641 has 8 divisors (see below), whose sum is σ = 8704584. Its totient is φ = 7067520.

The previous prime is 7869637. The next prime is 7869661. The reversal of 7869641 is 1469687.

It can be written as a sum of positive squares in 4 ways, for example, as 1000000 + 6869641 = 1000^2 + 2621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7869641 - 2² = 7869637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7869661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7700 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (1088073).

Almost surely, 2^7869641 is an apocalyptic number.

It is an amenable number.

7869641 is a deficient number, since it is larger than the sum of its proper divisors (834943).

7869641 is a wasteful number, since it uses less digits than its factorization.

7869641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411.

The product of its digits is 72576, while the sum is 41.

The square root of 7869641 is about 2805.2880422516. The cubic root of 7869641 is about 198.9077204871.

The spelling of 7869641 in words is "seven million, eight hundred sixty-nine thousand, six hundred forty-one".