499981465 has 4 divisors (see below), whose sum is σ = 599977764. Its totient is φ = 399985168.

The previous prime is 499981457. The next prime is 499981519. The reversal of 499981465 is 564189994.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200137609 + 299843856 = 14147^2 + 17316^2 .

It is a cyclic number.

It is not a de Polignac number, because 499981465 - 2³ = 499981457 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, 49998142 + ... + 49998151.

It is an arithmetic number, because the mean of its divisors is an integer number (149994441).

Almost surely, 2^499981465 is an apocalyptic number.

It is an amenable number.

499981465 is a deficient number, since it is larger than the sum of its proper divisors (99996299).

499981465 is an equidigital number, since it uses as much as digits as its factorization.

499981465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99996298.

The product of its digits is 2799360, while the sum is 55.

The square root of 499981465 is about 22360.2653159572. The cubic root of 499981465 is about 793.6907183701.

The spelling of 499981465 in words is "four hundred ninety-nine million, nine hundred eighty-one thousand, four hundred sixty-five".