699881489 has 2 divisors, whose sum is σ = 699881490. Its totient is φ = 699881488.

The previous prime is 699881471. The next prime is 699881519. The reversal of 699881489 is 984188996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603193600 + 96687889 = 24560^2 + 9833^2 .

It is a cyclic number.

It is not a de Polignac number, because 699881489 - 2¹⁶ = 699815953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (699881989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349940744 + 349940745.

It is an arithmetic number, because the mean of its divisors is an integer number (349940745).

Almost surely, 2^699881489 is an apocalyptic number.

It is an amenable number.

699881489 is a deficient number, since it is larger than the sum of its proper divisors (1).

699881489 is an equidigital number, since it uses as much as digits as its factorization.

699881489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 62.

The square root of 699881489 is about 26455.2733684610. The cubic root of 699881489 is about 887.8538911093.

The spelling of 699881489 in words is "six hundred ninety-nine million, eight hundred eighty-one thousand, four hundred eighty-nine".