2967991 has 4 divisors (see below), whose sum is σ = 3196312. Its totient is φ = 2739672.

The previous prime is 2967983. The next prime is 2968001. The reversal of 2967991 is 1997692.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2967991 - 2³ = 2967983 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 (2967901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114141 + ... + 114166.

It is an arithmetic number, because the mean of its divisors is an integer number (799078).

2^2967991 is an apocalyptic number.

2967991 is a deficient number, since it is larger than the sum of its proper divisors (228321).

2967991 is a wasteful number, since it uses less digits than its factorization.

2967991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228320.

The product of its digits is 61236, while the sum is 43.

The square root of 2967991 is about 1722.7858253422. The cubic root of 2967991 is about 143.7101777532.

Subtracting from 2967991 its reverse (1997692), we obtain a cube (970299 = 99³).

The spelling of 2967991 in words is "two million, nine hundred sixty-seven thousand, nine hundred ninety-one".