499578061 has 2 divisors, whose sum is σ = 499578062. Its totient is φ = 499578060.

The previous prime is 499578059. The next prime is 499578073. The reversal of 499578061 is 160875994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489781161 + 9796900 = 22131^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 499578061 - 2¹ = 499578059 is a prime.

Together with 499578059, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 499577996 and 499578014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499578011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249789030 + 249789031.

It is an arithmetic number, because the mean of its divisors is an integer number (249789031).

Almost surely, 2^499578061 is an apocalyptic number.

It is an amenable number.

499578061 is a deficient number, since it is larger than the sum of its proper divisors (1).

499578061 is an equidigital number, since it uses as much as digits as its factorization.

499578061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 499578061 is about 22351.2429408299. The cubic root of 499578061 is about 793.4772010151.

The spelling of 499578061 in words is "four hundred ninety-nine million, five hundred seventy-eight thousand, sixty-one".