498981689 has 2 divisors, whose sum is σ = 498981690. Its totient is φ = 498981688.

The previous prime is 498981607. The next prime is 498981701. The reversal of 498981689 is 986189894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390655225 + 108326464 = 19765^2 + 10408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498981689 is a prime.

It is not a weakly prime, because it can be changed into another prime (498981089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249490844 + 249490845.

It is an arithmetic number, because the mean of its divisors is an integer number (249490845).

Almost surely, 2^498981689 is an apocalyptic number.

It is an amenable number.

498981689 is a deficient number, since it is larger than the sum of its proper divisors (1).

498981689 is an equidigital number, since it uses as much as digits as its factorization.

498981689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 62.

The square root of 498981689 is about 22337.8980434597. The cubic root of 498981689 is about 793.1613371261.

The spelling of 498981689 in words is "four hundred ninety-eight million, nine hundred eighty-one thousand, six hundred eighty-nine".