698009057 has 2 divisors, whose sum is σ = 698009058. Its totient is φ = 698009056.

The previous prime is 698009027. The next prime is 698009087. The reversal of 698009057 is 750900896.

698009057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (698009027) and next prime (698009087).

It can be written as a sum of positive squares in only one way, i.e., 632220736 + 65788321 = 25144^2 + 8111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698009057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 698008999 and 698009017.

It is not a weakly prime, because it can be changed into another prime (698009027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349004528 + 349004529.

It is an arithmetic number, because the mean of its divisors is an integer number (349004529).

Almost surely, 2^698009057 is an apocalyptic number.

It is an amenable number.

698009057 is a deficient number, since it is larger than the sum of its proper divisors (1).

698009057 is an equidigital number, since it uses as much as digits as its factorization.

698009057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 698009057 is about 26419.8610329426. The cubic root of 698009057 is about 887.0614089459.

The spelling of 698009057 in words is "six hundred ninety-eight million, nine thousand, fifty-seven".