2927991 has 16 divisors (see below), whose sum is σ = 4314240. Its totient is φ = 1751520.

The previous prime is 2927983. The next prime is 2928007. The reversal of 2927991 is 1997292.

It is a happy number.

It is not a de Polignac number, because 2927991 - 2³ = 2927983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2927941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2205 + ... + 3273.

It is an arithmetic number, because the mean of its divisors is an integer number (269640).

2^2927991 is an apocalyptic number.

2927991 is a deficient number, since it is larger than the sum of its proper divisors (1386249).

2927991 is a wasteful number, since it uses less digits than its factorization.

2927991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

The product of its digits is 20412, while the sum is 39.

The square root of 2927991 is about 1711.1373410688. The cubic root of 2927991 is about 143.0616553209.

The spelling of 2927991 in words is "two million, nine hundred twenty-seven thousand, nine hundred ninety-one".