2987951 has 4 divisors (see below), whose sum is σ = 2992392. Its totient is φ = 2983512.

The previous prime is 2987947. The next prime is 2987969. The reversal of 2987951 is 1597892.

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

It is a cyclic number.

It is not a de Polignac number, because 2987951 - 2² = 2987947 is a prime.

It is a super-3 number, since 3×2987951³ = 80027945569063339053, which contains 333 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 9 + 8⁷ + 7⁷ + 9⁵ + 5 + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2987899 and 2987908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987911) 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, 980 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (748098).

2^2987951 is an apocalyptic number.

2987951 is a deficient number, since it is larger than the sum of its proper divisors (4441).

2987951 is an equidigital number, since it uses as much as digits as its factorization.

2987951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440.

The product of its digits is 45360, while the sum is 41.

The square root of 2987951 is about 1728.5690613915. The cubic root of 2987951 is about 144.0316127868.

The spelling of 2987951 in words is "two million, nine hundred eighty-seven thousand, nine hundred fifty-one".