498988691 has 2 divisors, whose sum is σ = 498988692. Its totient is φ = 498988690.

The previous prime is 498988687. The next prime is 498988717. The reversal of 498988691 is 196889894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 498988691 - 2² = 498988687 is a prime.

It is not a weakly prime, because it can be changed into another prime (498988681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249494345 + 249494346.

It is an arithmetic number, because the mean of its divisors is an integer number (249494346).

Almost surely, 2^498988691 is an apocalyptic number.

498988691 is a deficient number, since it is larger than the sum of its proper divisors (1).

498988691 is an equidigital number, since it uses as much as digits as its factorization.

498988691 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 498988691 is about 22338.0547720700. The cubic root of 498988691 is about 793.1650471418.

The spelling of 498988691 in words is "four hundred ninety-eight million, nine hundred eighty-eight thousand, six hundred ninety-one".