2072991 has 4 divisors (see below), whose sum is σ = 2763992. Its totient is φ = 1381992.

The previous prime is 2072977. The next prime is 2073011. The reversal of 2072991 is 1992702.

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

It is not a de Polignac number, because 2072991 - 2⁶ = 2072927 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2072491) 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, 345496 + ... + 345501.

It is an arithmetic number, because the mean of its divisors is an integer number (690998).

2^2072991 is an apocalyptic number.

2072991 is a deficient number, since it is larger than the sum of its proper divisors (691001).

2072991 is an equidigital number, since it uses as much as digits as its factorization.

2072991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691000.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2072991 is about 1439.7885261385. The cubic root of 2072991 is about 127.5065433013.

The spelling of 2072991 in words is "two million, seventy-two thousand, nine hundred ninety-one".