499980989 has 4 divisors (see below), whose sum is σ = 516109440. Its totient is φ = 483852540.

The previous prime is 499980983. The next prime is 499980997. The reversal of 499980989 is 989089994.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499980989 is a prime.

It is a super-2 number, since 2×499980989² = 499961978722836242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499980983) 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, 8064179 + ... + 8064240.

It is an arithmetic number, because the mean of its divisors is an integer number (129027360).

Almost surely, 2^499980989 is an apocalyptic number.

It is an amenable number.

499980989 is a deficient number, since it is larger than the sum of its proper divisors (16128451).

499980989 is a wasteful number, since it uses less digits than its factorization.

499980989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16128450.

The product of its (nonzero) digits is 15116544, while the sum is 65.

The square root of 499980989 is about 22360.2546720738. The cubic root of 499980989 is about 793.6904664961.

The spelling of 499980989 in words is "four hundred ninety-nine million, nine hundred eighty thousand, nine hundred eighty-nine".