489621749 has 2 divisors, whose sum is σ = 489621750. Its totient is φ = 489621748.

The previous prime is 489621683. The next prime is 489621757. The reversal of 489621749 is 947126984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303108100 + 186513649 = 17410^2 + 13657^2 .

It is a cyclic number.

It is not a de Polignac number, because 489621749 - 2²⁸ = 221186293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 489621697 and 489621706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489641749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244810874 + 244810875.

It is an arithmetic number, because the mean of its divisors is an integer number (244810875).

Almost surely, 2^489621749 is an apocalyptic number.

It is an amenable number.

489621749 is a deficient number, since it is larger than the sum of its proper divisors (1).

489621749 is an equidigital number, since it uses as much as digits as its factorization.

489621749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 489621749 is about 22127.3981525167. The cubic root of 489621749 is about 788.1706048578.

The spelling of 489621749 in words is "four hundred eighty-nine million, six hundred twenty-one thousand, seven hundred forty-nine".