2128978573 has 2 divisors, whose sum is σ = 2128978574. Its totient is φ = 2128978572.

The previous prime is 2128978559. The next prime is 2128978583. The reversal of 2128978573 is 3758798212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1684527849 + 444450724 = 41043^2 + 21082^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128978573 - 2¹³ = 2128970381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2128978573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128978513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064489286 + 1064489287.

It is an arithmetic number, because the mean of its divisors is an integer number (1064489287).

Almost surely, 2^2128978573 is an apocalyptic number.

It is an amenable number.

2128978573 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128978573 is an equidigital number, since it uses as much as digits as its factorization.

2128978573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 2128978573 is about 46140.8557896362. The cubic root of 2128978573 is about 1286.4426505201.

The spelling of 2128978573 in words is "two billion, one hundred twenty-eight million, nine hundred seventy-eight thousand, five hundred seventy-three".