698128361 has 16 divisors (see below), whose sum is σ = 852864768. Its totient is φ = 558412800.

The previous prime is 698128331. The next prime is 698128367. The reversal of 698128361 is 163821896.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698128361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (698128367) 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 in 15 ways as a sum of consecutive naturals, for example, 46280 + ... + 59481.

It is an arithmetic number, because the mean of its divisors is an integer number (53304048).

Almost surely, 2^698128361 is an apocalyptic number.

It is an amenable number.

698128361 is a deficient number, since it is larger than the sum of its proper divisors (154736407).

698128361 is a wasteful number, since it uses less digits than its factorization.

698128361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105832.

The product of its digits is 124416, while the sum is 44.

The square root of 698128361 is about 26422.1187833224. The cubic root of 698128361 is about 887.1119450359. Note that the first 3 decimals are identical.

The spelling of 698128361 in words is "six hundred ninety-eight million, one hundred twenty-eight thousand, three hundred sixty-one".