3872691 has 12 divisors (see below), whose sum is σ = 5801432. Its totient is φ = 2581632.

The previous prime is 3872681. The next prime is 3872731. The reversal of 3872691 is 1962783.

It is not a de Polignac number, because 3872691 - 2¹³ = 3864499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3872681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7726 + ... + 8211.

Almost surely, 2^3872691 is an apocalyptic number.

3872691 is a deficient number, since it is larger than the sum of its proper divisors (1928741).

3872691 is an equidigital number, since it uses as much as digits as its factorization.

3872691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15952 (or 15940 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 3872691 is about 1967.9153945228. The cubic root of 3872691 is about 157.0378287954.

The spelling of 3872691 in words is "three million, eight hundred seventy-two thousand, six hundred ninety-one".