502649989 has 2 divisors, whose sum is σ = 502649990. Its totient is φ = 502649988.

The previous prime is 502649977. The next prime is 502650047. The reversal of 502649989 is 989946205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309161889 + 193488100 = 17583^2 + 13910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-502649989 is a prime.

It is a super-2 number, since 2×502649989² = 505314022883400242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502649789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251324994 + 251324995.

It is an arithmetic number, because the mean of its divisors is an integer number (251324995).

Almost surely, 2^502649989 is an apocalyptic number.

It is an amenable number.

502649989 is a deficient number, since it is larger than the sum of its proper divisors (1).

502649989 is an equidigital number, since it uses as much as digits as its factorization.

502649989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 502649989 is about 22419.8570245218. The cubic root of 502649989 is about 795.1002544875.

The spelling of 502649989 in words is "five hundred two million, six hundred forty-nine thousand, nine hundred eighty-nine".