2891223682 has 4 divisors (see below), whose sum is σ = 4336835526. Its totient is φ = 1445611840.

The previous prime is 2891223661. The next prime is 2891223689. The reversal of 2891223682 is 2863221982.

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., 2634871561 + 256352121 = 51331^2 + 16011^2 .

It is not an unprimeable number, because it can be changed into a prime (2891223689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722805919 + ... + 722805922.

Almost surely, 2^2891223682 is an apocalyptic number.

2891223682 is a deficient number, since it is larger than the sum of its proper divisors (1445611844).

2891223682 is a wasteful number, since it uses less digits than its factorization.

2891223682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445611843.

The product of its digits is 165888, while the sum is 43.

The square root of 2891223682 is about 53770.1002602748. The cubic root of 2891223682 is about 1424.6031408658.

The spelling of 2891223682 in words is "two billion, eight hundred ninety-one million, two hundred twenty-three thousand, six hundred eighty-two".