498661385 has 4 divisors (see below), whose sum is σ = 598393668. Its totient is φ = 398929104.

The previous prime is 498661349. The next prime is 498661421. The reversal of 498661385 is 583166894.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583166894 = 2 ⋅291583447.

It is an interprime number because it is at equal distance from previous prime (498661349) and next prime (498661421).

It can be written as a sum of positive squares in 2 ways, for example, as 187032976 + 311628409 = 13676^2 + 17653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498661385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49866134 + ... + 49866143.

It is an arithmetic number, because the mean of its divisors is an integer number (149598417).

Almost surely, 2^498661385 is an apocalyptic number.

It is an amenable number.

498661385 is a deficient number, since it is larger than the sum of its proper divisors (99732283).

498661385 is an equidigital number, since it uses as much as digits as its factorization.

498661385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99732282.

The product of its digits is 1244160, while the sum is 50.

The square root of 498661385 is about 22330.7273728376. The cubic root of 498661385 is about 792.9915866563.

The spelling of 498661385 in words is "four hundred ninety-eight million, six hundred sixty-one thousand, three hundred eighty-five".