2973521389 has 2 divisors, whose sum is σ = 2973521390. Its totient is φ = 2973521388.

The previous prime is 2973521359. The next prime is 2973521399. The reversal of 2973521389 is 9831253792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2908444900 + 65076489 = 53930^2 + 8067^2 .

It is a cyclic number.

It is not a de Polignac number, because 2973521389 - 2⁹ = 2973520877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2973521359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486760694 + 1486760695.

It is an arithmetic number, because the mean of its divisors is an integer number (1486760695).

Almost surely, 2^2973521389 is an apocalyptic number.

It is an amenable number.

2973521389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2973521389 is an equidigital number, since it uses as much as digits as its factorization.

2973521389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 2973521389 is about 54530.0044837702. The cubic root of 2973521389 is about 1437.9938288117.

The spelling of 2973521389 in words is "two billion, nine hundred seventy-three million, five hundred twenty-one thousand, three hundred eighty-nine".