501611489 has 2 divisors, whose sum is σ = 501611490. Its totient is φ = 501611488.

The previous prime is 501611477. The next prime is 501611549. The reversal of 501611489 is 984116105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478734400 + 22877089 = 21880^2 + 4783^2 .

It is a cyclic number.

It is not a de Polignac number, because 501611489 - 2²⁰ = 500562913 is a prime.

It is a super-2 number, since 2×501611489² = 503228171793594242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (501611449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250805744 + 250805745.

It is an arithmetic number, because the mean of its divisors is an integer number (250805745).

Almost surely, 2^501611489 is an apocalyptic number.

It is an amenable number.

501611489 is a deficient number, since it is larger than the sum of its proper divisors (1).

501611489 is an equidigital number, since it uses as much as digits as its factorization.

501611489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 501611489 is about 22396.6847769932. The cubic root of 501611489 is about 794.5523046617.

The spelling of 501611489 in words is "five hundred one million, six hundred eleven thousand, four hundred eighty-nine".