501000989 has 2 divisors, whose sum is σ = 501000990. Its totient is φ = 501000988.

The previous prime is 501000977. The next prime is 501001001. The reversal of 501000989 is 989000105.

It is a balanced prime because it is at equal distance from previous prime (501000977) and next prime (501001001).

It can be written as a sum of positive squares in only one way, i.e., 499164964 + 1836025 = 22342^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 501000989 - 2¹² = 500996893 is a prime.

It is a Chen prime.

It is equal to p_26405843 and since 501000989 and 26405843 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501000959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250500494 + 250500495.

It is an arithmetic number, because the mean of its divisors is an integer number (250500495).

Almost surely, 2^501000989 is an apocalyptic number.

It is an amenable number.

501000989 is a deficient number, since it is larger than the sum of its proper divisors (1).

501000989 is an equidigital number, since it uses as much as digits as its factorization.

501000989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 501000989 is about 22383.0513782192. The cubic root of 501000989 is about 794.2298299200.

The spelling of 501000989 in words is "five hundred one million, nine hundred eighty-nine", and thus it is an aban number.