499989000061 has 4 divisors (see below), whose sum is σ = 499993781692. Its totient is φ = 499984218432.

The previous prime is 499989000059. The next prime is 499989000079. The reversal of 499989000061 is 160000989994.

499989000061 = 499994² + 499995².

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 249995000025 + 249994000036 = 499995^2 + 499994^2 .

It is a cyclic number.

It is not a de Polignac number, because 499989000061 - 2¹ = 499989000059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 499988999966 and 499989000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499989000661) 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, 2230380 + ... + 2444293.

It is an arithmetic number, because the mean of its divisors is an integer number (124998445423).

Almost surely, 2^499989000061 is an apocalyptic number.

499989000061 is the 499995-th centered square number.

It is an amenable number.

499989000061 is a deficient number, since it is larger than the sum of its proper divisors (4781631).

499989000061 is a wasteful number, since it uses less digits than its factorization.

499989000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781630.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The spelling of 499989000061 in words is "four hundred ninety-nine billion, nine hundred eighty-nine million, sixty-one", and thus it is an aban number.