699161855989 has 2 divisors, whose sum is σ = 699161855990. Its totient is φ = 699161855988.

The previous prime is 699161855981. The next prime is 699161856047. The reversal of 699161855989 is 989558161996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427755240900 + 271406615089 = 654030^2 + 520967^2 .

It is a cyclic number.

It is not a de Polignac number, because 699161855989 - 2³ = 699161855981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699161855981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349580927994 + 349580927995.

It is an arithmetic number, because the mean of its divisors is an integer number (349580927995).

Almost surely, 2^699161855989 is an apocalyptic number.

It is an amenable number.

699161855989 is a deficient number, since it is larger than the sum of its proper divisors (1).

699161855989 is an equidigital number, since it uses as much as digits as its factorization.

699161855989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 377913600, while the sum is 76.

The spelling of 699161855989 in words is "six hundred ninety-nine billion, one hundred sixty-one million, eight hundred fifty-five thousand, nine hundred eighty-nine".