2916978291 has 16 divisors (see below), whose sum is σ = 4355481600. Its totient is φ = 1929337704.

The previous prime is 2916978283. The next prime is 2916978301. The reversal of 2916978291 is 1928796192.

2916978291 is a `hidden beast` number, since 291 + 69 + 7 + 8 + 291 = 666.

It is not a de Polignac number, because 2916978291 - 2³ = 2916978283 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2916978791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421911 + ... + 428768.

It is an arithmetic number, because the mean of its divisors is an integer number (272217600).

Almost surely, 2^2916978291 is an apocalyptic number.

2916978291 is a deficient number, since it is larger than the sum of its proper divisors (1438503309).

2916978291 is a wasteful number, since it uses less digits than its factorization.

2916978291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850815 (or 850809 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 2916978291 is about 54009.0574903877. The cubic root of 2916978291 is about 1428.8206964143.

The spelling of 2916978291 in words is "two billion, nine hundred sixteen million, nine hundred seventy-eight thousand, two hundred ninety-one".