499999993 has 2 divisors, whose sum is σ = 499999994. Its totient is φ = 499999992.

The previous prime is 499999931. The next prime is 500000003. The reversal of 499999993 is 399999994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347897104 + 152102889 = 18652^2 + 12333^2 .

It is a cyclic number.

It is not a de Polignac number, because 499999993 - 2¹³ = 499991801 is a prime.

It is not a weakly prime, because it can be changed into another prime (499999693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999996 + 249999997.

It is an arithmetic number, because the mean of its divisors is an integer number (249999997).

Almost surely, 2^499999993 is an apocalyptic number.

It is an amenable number.

499999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

499999993 is an equidigital number, since it uses as much as digits as its factorization.

499999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57395628, while the sum is 70.

The square root of 499999993 is about 22360.6796184731. The cubic root of 499999993 is about 793.7005222802.

Subtracting from 499999993 its reverse (399999994), we obtain a palindrome (99999999).

The spelling of 499999993 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".