2576947921 has 2 divisors, whose sum is σ = 2576947922. Its totient is φ = 2576947920.

The previous prime is 2576947837. The next prime is 2576947931. The reversal of 2576947921 is 1297496752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2254350400 + 322597521 = 47480^2 + 17961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2576947921 - 2¹⁷ = 2576816849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2576947931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1288473960 + 1288473961.

It is an arithmetic number, because the mean of its divisors is an integer number (1288473961).

Almost surely, 2^2576947921 is an apocalyptic number.

It is an amenable number.

2576947921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2576947921 is an equidigital number, since it uses as much as digits as its factorization.

2576947921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 2576947921 is about 50763.6476329272. The cubic root of 2576947921 is about 1370.9929259176.

The spelling of 2576947921 in words is "two billion, five hundred seventy-six million, nine hundred forty-seven thousand, nine hundred twenty-one".