3872991 has 8 divisors (see below), whose sum is σ = 5467824. Its totient is φ = 2430080.

The previous prime is 3872977. The next prime is 3873007. The reversal of 3872991 is 1992783.

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 3872991 - 2⁵ = 3872959 is a prime.

3872991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3872971) 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, 37920 + ... + 38021.

It is an arithmetic number, because the mean of its divisors is an integer number (683478).

Almost surely, 2^3872991 is an apocalyptic number.

3872991 is a deficient number, since it is larger than the sum of its proper divisors (1594833).

3872991 is a wasteful number, since it uses less digits than its factorization.

3872991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75961.

The product of its digits is 27216, while the sum is 39.

The square root of 3872991 is about 1967.9916158358. The cubic root of 3872991 is about 157.0418836961.

The spelling of 3872991 in words is "three million, eight hundred seventy-two thousand, nine hundred ninety-one".