2947954581 has 120 divisors (see below), whose sum is σ = 5523503832. Its totient is φ = 1551052800.

The previous prime is 2947954573. The next prime is 2947954627. The reversal of 2947954581 is 1854597492.

It is a happy number.

2947954581 is a `hidden beast` number, since 2 + 9 + 4 + 7 + 9 + 54 + 581 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 79388100 + 2868566481 = 8910^2 + 53559^2 .

It is not a de Polignac number, because 2947954581 - 2³ = 2947954573 is a prime.

It is a super-2 number, since 2×2947954581² = 17380872423277771122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2947954501) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2165341 + ... + 2166701.

Almost surely, 2^2947954581 is an apocalyptic number.

It is an amenable number.

2947954581 is a deficient number, since it is larger than the sum of its proper divisors (2575549251).

2947954581 is a wasteful number, since it uses less digits than its factorization.

2947954581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1405 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 2947954581 is about 54295.0695827899. The cubic root of 2947954581 is about 1433.8605937554.

The spelling of 2947954581 in words is "two billion, nine hundred forty-seven million, nine hundred fifty-four thousand, five hundred eighty-one".