2972991 has 16 divisors (see below), whose sum is σ = 4600064. Its totient is φ = 1672704.

The previous prime is 2972971. The next prime is 2973001. The reversal of 2972991 is 1992792.

It is a happy number.

It is not a de Polignac number, because 2972991 - 2⁷ = 2972863 is a prime.

2972991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2972971) 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, 351 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (287504).

2^2972991 is an apocalyptic number.

2972991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2972991 is a deficient number, since it is larger than the sum of its proper divisors (1627073).

2972991 is a wasteful number, since it uses less digits than its factorization.

2972991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190.

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

The square root of 2972991 is about 1724.2363527081. The cubic root of 2972991 is about 143.7908325087.

The spelling of 2972991 in words is "two million, nine hundred seventy-two thousand, nine hundred ninety-one".