698545889 has 4 divisors (see below), whose sum is σ = 702448560. Its totient is φ = 694643220.

The previous prime is 698545871. The next prime is 698545901. The reversal of 698545889 is 988545896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 698545889 - 2⁸ = 698545633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698541889) 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, 1951067 + ... + 1951424.

It is an arithmetic number, because the mean of its divisors is an integer number (175612140).

Almost surely, 2^698545889 is an apocalyptic number.

It is an amenable number.

698545889 is a deficient number, since it is larger than the sum of its proper divisors (3902671).

698545889 is a wasteful number, since it uses less digits than its factorization.

698545889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902670.

The product of its digits is 24883200, while the sum is 62.

The square root of 698545889 is about 26430.0187097928. The cubic root of 698545889 is about 887.2887607817.

The spelling of 698545889 in words is "six hundred ninety-eight million, five hundred forty-five thousand, eight hundred eighty-nine".