499438907609 has 2 divisors, whose sum is σ = 499438907610. Its totient is φ = 499438907608.

The previous prime is 499438907503. The next prime is 499438907657. The reversal of 499438907609 is 906709834994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490520938384 + 8917969225 = 700372^2 + 94435^2 .

It is a cyclic number.

It is not a de Polignac number, because 499438907609 - 2³⁶ = 430719430873 is a prime.

It is a super-3 number, since 3×499438907609³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (499438907699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249719453804 + 249719453805.

It is an arithmetic number, because the mean of its divisors is an integer number (249719453805).

Almost surely, 2^499438907609 is an apocalyptic number.

It is an amenable number.

499438907609 is a deficient number, since it is larger than the sum of its proper divisors (1).

499438907609 is an equidigital number, since it uses as much as digits as its factorization.

499438907609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 499438907609 in words is "four hundred ninety-nine billion, four hundred thirty-eight million, nine hundred seven thousand, six hundred nine".