2997861 has 4 divisors (see below), whose sum is σ = 3997152. Its totient is φ = 1998572.

The previous prime is 2997859. The next prime is 2997871. The reversal of 2997861 is 1687992.

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 2997861 - 2¹ = 2997859 is a prime.

It is an Ulam number.

It is a D-number.

2997861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2997811) 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, 499641 + ... + 499646.

It is an arithmetic number, because the mean of its divisors is an integer number (999288).

2^2997861 is an apocalyptic number.

It is an amenable number.

2997861 is a deficient number, since it is larger than the sum of its proper divisors (999291).

2997861 is an equidigital number, since it uses as much as digits as its factorization.

2997861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999290.

The product of its digits is 54432, while the sum is 42.

The square root of 2997861 is about 1731.4332213516. The cubic root of 2997861 is about 144.1906714161.

The spelling of 2997861 in words is "two million, nine hundred ninety-seven thousand, eight hundred sixty-one".