2891259634 has 4 divisors (see below), whose sum is σ = 4336889454. Its totient is φ = 1445629816.

The previous prime is 2891259611. The next prime is 2891259653. The reversal of 2891259634 is 4369521982.

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., 2773602225 + 117657409 = 52665^2 + 10847^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 722814907 + ... + 722814910.

Almost surely, 2^2891259634 is an apocalyptic number.

2891259634 is a deficient number, since it is larger than the sum of its proper divisors (1445629820).

2891259634 is a wasteful number, since it uses less digits than its factorization.

2891259634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445629819.

The product of its digits is 933120, while the sum is 49.

The square root of 2891259634 is about 53770.4345714260. The cubic root of 2891259634 is about 1424.6090457612.

The spelling of 2891259634 in words is "two billion, eight hundred ninety-one million, two hundred fifty-nine thousand, six hundred thirty-four".