4897887989 has 2 divisors, whose sum is σ = 4897887990. Its totient is φ = 4897887988.

The previous prime is 4897887947. The next prime is 4897888013. The reversal of 4897887989 is 9897887984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4484579089 + 413308900 = 66967^2 + 20330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4897887989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4897889989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2448943994 + 2448943995.

It is an arithmetic number, because the mean of its divisors is an integer number (2448943995).

Almost surely, 2^4897887989 is an apocalyptic number.

It is an amenable number.

4897887989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4897887989 is an equidigital number, since it uses as much as digits as its factorization.

4897887989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 585252864, while the sum is 77.

The square root of 4897887989 is about 69984.9125812128. The cubic root of 4897887989 is about 1698.2551866212.

The spelling of 4897887989 in words is "four billion, eight hundred ninety-seven million, eight hundred eighty-seven thousand, nine hundred eighty-nine".