699649859 has 2 divisors, whose sum is σ = 699649860. Its totient is φ = 699649858.

The previous prime is 699649843. The next prime is 699649877. The reversal of 699649859 is 958946996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 699649859 - 2⁴ = 699649843 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 699649795 and 699649804.

It is not a weakly prime, because it can be changed into another prime (699649829) 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, 349824929 + 349824930.

It is an arithmetic number, because the mean of its divisors is an integer number (349824930).

Almost surely, 2^699649859 is an apocalyptic number.

699649859 is a deficient number, since it is larger than the sum of its proper divisors (1).

699649859 is an equidigital number, since it uses as much as digits as its factorization.

699649859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37791360, while the sum is 65.

The square root of 699649859 is about 26450.8952400481. The cubic root of 699649859 is about 887.7559334352.

The spelling of 699649859 in words is "six hundred ninety-nine million, six hundred forty-nine thousand, eight hundred fifty-nine".