699085643 has 2 divisors, whose sum is σ = 699085644. Its totient is φ = 699085642.

The previous prime is 699085633. The next prime is 699085649. The reversal of 699085643 is 346580996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 699085643 - 2⁶ = 699085579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 699085591 and 699085600.

It is not a weakly prime, because it can be changed into another prime (699085649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349542821 + 349542822.

It is an arithmetic number, because the mean of its divisors is an integer number (349542822).

Almost surely, 2^699085643 is an apocalyptic number.

699085643 is a deficient number, since it is larger than the sum of its proper divisors (1).

699085643 is an equidigital number, since it uses as much as digits as its factorization.

699085643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 699085643 is about 26440.2277410767. The cubic root of 699085643 is about 887.5172327012.

The spelling of 699085643 in words is "six hundred ninety-nine million, eighty-five thousand, six hundred forty-three".