699321617 has 2 divisors, whose sum is σ = 699321618. Its totient is φ = 699321616.

The previous prime is 699321613. The next prime is 699321743. The reversal of 699321617 is 716123996.

699321617 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., 699285136 + 36481 = 26444^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 699321617 - 2² = 699321613 is a prime.

It is not a weakly prime, because it can be changed into another prime (699321611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349660808 + 349660809.

It is an arithmetic number, because the mean of its divisors is an integer number (349660809).

Almost surely, 2^699321617 is an apocalyptic number.

It is an amenable number.

699321617 is a deficient number, since it is larger than the sum of its proper divisors (1).

699321617 is an equidigital number, since it uses as much as digits as its factorization.

699321617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 699321617 is about 26444.6897694036. The cubic root of 699321617 is about 887.6170809500.

The spelling of 699321617 in words is "six hundred ninety-nine million, three hundred twenty-one thousand, six hundred seventeen".