2991173 has 4 divisors (see below), whose sum is σ = 3121248. Its totient is φ = 2861100.

The previous prime is 2991143. The next prime is 2991187. The reversal of 2991173 is 3711992.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2991173 - 2⁸ = 2990917 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 (2991103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65003 + ... + 65048.

It is an arithmetic number, because the mean of its divisors is an integer number (780312).

2^2991173 is an apocalyptic number.

2991173 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2991173 is a deficient number, since it is larger than the sum of its proper divisors (130075).

2991173 is a wasteful number, since it uses less digits than its factorization.

2991173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130074.

The product of its digits is 3402, while the sum is 32.

The square root of 2991173 is about 1729.5007950273. The cubic root of 2991173 is about 144.0833654371.

The spelling of 2991173 in words is "two million, nine hundred ninety-one thousand, one hundred seventy-three".