699875989 has 2 divisors, whose sum is σ = 699875990. Its totient is φ = 699875988.

The previous prime is 699875987. The next prime is 699876017. The reversal of 699875989 is 989578996.

699875989 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., 695640625 + 4235364 = 26375^2 + 2058^2 .

It is a cyclic number.

It is not a de Polignac number, because 699875989 - 2¹ = 699875987 is a prime.

Together with 699875987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699875987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349937994 + 349937995.

It is an arithmetic number, because the mean of its divisors is an integer number (349937995).

Almost surely, 2^699875989 is an apocalyptic number.

It is an amenable number.

699875989 is a deficient number, since it is larger than the sum of its proper divisors (1).

699875989 is an equidigital number, since it uses as much as digits as its factorization.

699875989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88179840, while the sum is 70.

The square root of 699875989 is about 26455.1694192269. The cubic root of 699875989 is about 887.8515653778.

The spelling of 699875989 in words is "six hundred ninety-nine million, eight hundred seventy-five thousand, nine hundred eighty-nine".