499961663 has 4 divisors (see below), whose sum is σ = 501741168. Its totient is φ = 498182160.

The previous prime is 499961659. The next prime is 499961669. The reversal of 499961663 is 366169994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366169994 = 2 ⋅183084997.

It is a cyclic number.

It is not a de Polignac number, because 499961663 - 2² = 499961659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499961669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889331 + ... + 889892.

It is an arithmetic number, because the mean of its divisors is an integer number (125435292).

Almost surely, 2^499961663 is an apocalyptic number.

499961663 is a deficient number, since it is larger than the sum of its proper divisors (1779505).

499961663 is a wasteful number, since it uses less digits than its factorization.

499961663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779504.

The product of its digits is 1889568, while the sum is 53.

The square root of 499961663 is about 22359.8225171847. The cubic root of 499961663 is about 793.6802400676.

The spelling of 499961663 in words is "four hundred ninety-nine million, nine hundred sixty-one thousand, six hundred sixty-three".