2912890689 has 6 divisors (see below), whose sum is σ = 4207508786. Its totient is φ = 1941927120.

The previous prime is 2912890621. The next prime is 2912890693. The reversal of 2912890689 is 9860982192.

It can be written as a sum of positive squares in only one way, i.e., 1600640064 + 1312250625 = 40008^2 + 36225^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2912890689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2912890289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161827252 + ... + 161827269.

Almost surely, 2^2912890689 is an apocalyptic number.

It is an amenable number.

2912890689 is a deficient number, since it is larger than the sum of its proper divisors (1294618097).

2912890689 is a wasteful number, since it uses less digits than its factorization.

2912890689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323654527 (or 323654524 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 2912890689 is about 53971.2024046157. The cubic root of 2912890689 is about 1428.1529756910.

The spelling of 2912890689 in words is "two billion, nine hundred twelve million, eight hundred ninety thousand, six hundred eighty-nine".