689830501 has 2 divisors, whose sum is σ = 689830502. Its totient is φ = 689830500.

The previous prime is 689830487. The next prime is 689830541. The reversal of 689830501 is 105038986.

It is a happy number.

It is an a-pointer prime, because the next prime (689830541) can be obtained adding 689830501 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415099876 + 274730625 = 20374^2 + 16575^2 .

It is a cyclic number.

It is not a de Polignac number, because 689830501 - 2⁷ = 689830373 is a prime.

It is a super-2 number, since 2×689830501² = 951732240219822002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689830541) 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, 344915250 + 344915251.

It is an arithmetic number, because the mean of its divisors is an integer number (344915251).

Almost surely, 2^689830501 is an apocalyptic number.

It is an amenable number.

689830501 is a deficient number, since it is larger than the sum of its proper divisors (1).

689830501 is an equidigital number, since it uses as much as digits as its factorization.

689830501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 689830501 is about 26264.6245166383. The cubic root of 689830501 is about 883.5832294359.

The spelling of 689830501 in words is "six hundred eighty-nine million, eight hundred thirty thousand, five hundred one".