698321077 has 2 divisors, whose sum is σ = 698321078. Its totient is φ = 698321076.

The previous prime is 698321051. The next prime is 698321083. The reversal of 698321077 is 770123896.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543542596 + 154778481 = 23314^2 + 12441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698321077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698331077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349160538 + 349160539.

It is an arithmetic number, because the mean of its divisors is an integer number (349160539).

Almost surely, 2^698321077 is an apocalyptic number.

It is an amenable number.

698321077 is a deficient number, since it is larger than the sum of its proper divisors (1).

698321077 is an equidigital number, since it uses as much as digits as its factorization.

698321077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 698321077 is about 26425.7654004572. The cubic root of 698321077 is about 887.1935656215.

The spelling of 698321077 in words is "six hundred ninety-eight million, three hundred twenty-one thousand, seventy-seven".