2973978261 has 20 divisors (see below), whose sum is σ = 4454759232. Its totient is φ = 1977230088.

The previous prime is 2973978257. The next prime is 2973978263. The reversal of 2973978261 is 1628793792.

2973978261 is a `hidden beast` number, since 297 + 3 + 97 + 8 + 261 = 666.

It is not a de Polignac number, because 2973978261 - 2² = 2973978257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2973978198 and 2973978207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2973978263) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20295 + ... + 79748.

Almost surely, 2^2973978261 is an apocalyptic number.

It is an amenable number.

2973978261 is a deficient number, since it is larger than the sum of its proper divisors (1480780971).

2973978261 is a wasteful number, since it uses less digits than its factorization.

2973978261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100422 (or 100413 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 2973978261 is about 54534.1935027924. The cubic root of 2973978261 is about 1438.0674727494.

The spelling of 2973978261 in words is "two billion, nine hundred seventy-three million, nine hundred seventy-eight thousand, two hundred sixty-one".