2891287514 has 4 divisors (see below), whose sum is σ = 4336931274. Its totient is φ = 1445643756.

The previous prime is 2891287453. The next prime is 2891287541. The reversal of 2891287514 is 4157821982.

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

It can be written as a sum of positive squares in only one way, i.e., 2388765625 + 502521889 = 48875^2 + 22417^2 .

It is a super-2 number, since 2×2891287514² = 16719086977224600392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722821877 + ... + 722821880.

Almost surely, 2^2891287514 is an apocalyptic number.

2891287514 is a deficient number, since it is larger than the sum of its proper divisors (1445643760).

2891287514 is a wasteful number, since it uses less digits than its factorization.

2891287514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445643759.

The product of its digits is 322560, while the sum is 47.

The square root of 2891287514 is about 53770.6938210769. The cubic root of 2891287514 is about 1424.6136248464.

The spelling of 2891287514 in words is "two billion, eight hundred ninety-one million, two hundred eighty-seven thousand, five hundred fourteen".