2987961 has 4 divisors (see below), whose sum is σ = 3983952. Its totient is φ = 1991972.

The previous prime is 2987947. The next prime is 2987969. The reversal of 2987961 is 1697892.

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 2987961 - 2⁹ = 2987449 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2987969) 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, 497991 + ... + 497996.

It is an arithmetic number, because the mean of its divisors is an integer number (995988).

2^2987961 is an apocalyptic number.

It is an amenable number.

2987961 is a deficient number, since it is larger than the sum of its proper divisors (995991).

2987961 is an equidigital number, since it uses as much as digits as its factorization.

2987961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995990.

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

The square root of 2987961 is about 1728.5719539551. The cubic root of 2987961 is about 144.0317734671.

It can be divided in two parts, 29 and 87961, that added together give a triangular number (87990 = T₄₁₉).

The spelling of 2987961 in words is "two million, nine hundred eighty-seven thousand, nine hundred sixty-one".