689500901 has 2 divisors, whose sum is σ = 689500902. Its totient is φ = 689500900.

The previous prime is 689500871. The next prime is 689500949. The reversal of 689500901 is 109005986.

689500901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 523219876 + 166281025 = 22874^2 + 12895^2 .

It is a cyclic number.

It is not a de Polignac number, because 689500901 - 2¹⁴ = 689484517 is a prime.

It is a super-2 number, since 2×689500901² = 950822984959623602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689500991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344750450 + 344750451.

It is an arithmetic number, because the mean of its divisors is an integer number (344750451).

Almost surely, 2^689500901 is an apocalyptic number.

It is an amenable number.

689500901 is a deficient number, since it is larger than the sum of its proper divisors (1).

689500901 is an equidigital number, since it uses as much as digits as its factorization.

689500901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 689500901 is about 26258.3491674553. The cubic root of 689500901 is about 883.4424820942.

The spelling of 689500901 in words is "six hundred eighty-nine million, five hundred thousand, nine hundred one".