2969991 has 6 divisors (see below), whose sum is σ = 4290000. Its totient is φ = 1979988.

The previous prime is 2969987. The next prime is 2970031. The reversal of 2969991 is 1999692.

It is a happy number.

2969991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2969991 - 2² = 2969987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2969971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164991 + ... + 165008.

It is an arithmetic number, because the mean of its divisors is an integer number (715000).

2^2969991 is an apocalyptic number.

2969991 is a deficient number, since it is larger than the sum of its proper divisors (1320009).

2969991 is a wasteful number, since it uses less digits than its factorization.

2969991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330005 (or 330002 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 2969991 is about 1723.3661827946. The cubic root of 2969991 is about 143.7424505172.

Subtracting from 2969991 its reverse (1999692), we obtain a cube (970299 = 99³).

The spelling of 2969991 in words is "two million, nine hundred sixty-nine thousand, nine hundred ninety-one".