698128363 has 4 divisors (see below), whose sum is σ = 700648960. Its totient is φ = 695607768.

The previous prime is 698128331. The next prime is 698128367. The reversal of 698128363 is 363821896.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 698128363 - 2⁵ = 698128331 is a prime.

It is a super-2 number, since 2×698128363² = 974766422450119538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698128367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1259883 + ... + 1260436.

It is an arithmetic number, because the mean of its divisors is an integer number (175162240).

Almost surely, 2^698128363 is an apocalyptic number.

698128363 is a deficient number, since it is larger than the sum of its proper divisors (2520597).

698128363 is a wasteful number, since it uses less digits than its factorization.

698128363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520596.

The product of its digits is 373248, while the sum is 46.

The square root of 698128363 is about 26422.1188211695. The cubic root of 698128363 is about 887.1119458830. Note that the first 3 decimals are identical.

It can be divided in two parts, 6981 and 28363, that added together give a square (35344 = 188²).

The spelling of 698128363 in words is "six hundred ninety-eight million, one hundred twenty-eight thousand, three hundred sixty-three".