2891130993 has 12 divisors (see below), whose sum is σ = 4421729988. Its totient is φ = 1814042880.

The previous prime is 2891130971. The next prime is 2891131037. The reversal of 2891130993 is 3990311982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 959264784 + 1931866209 = 30972^2 + 43953^2 .

It is not a de Polignac number, because 2891130993 - 2⁹ = 2891130481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2891130923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9447988 + ... + 9448293.

It is an arithmetic number, because the mean of its divisors is an integer number (368477499).

Almost surely, 2^2891130993 is an apocalyptic number.

It is an amenable number.

2891130993 is a deficient number, since it is larger than the sum of its proper divisors (1530598995).

2891130993 is a wasteful number, since it uses less digits than its factorization.

2891130993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18896304 (or 18896301 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 2891130993 is about 53769.2383524260. The cubic root of 2891130993 is about 1424.5879170407.

The spelling of 2891130993 in words is "two billion, eight hundred ninety-one million, one hundred thirty thousand, nine hundred ninety-three".