698589121 has 4 divisors (see below), whose sum is σ = 699081472. Its totient is φ = 698096772.

The previous prime is 698589107. The next prime is 698589127. The reversal of 698589121 is 121985896.

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 a de Polignac number, because none of the positive numbers 2^k-698589121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698589127) 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, 244041 + ... + 246886.

It is an arithmetic number, because the mean of its divisors is an integer number (174770368).

Almost surely, 2^698589121 is an apocalyptic number.

It is an amenable number.

698589121 is a deficient number, since it is larger than the sum of its proper divisors (492351).

698589121 is a wasteful number, since it uses less digits than its factorization.

698589121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492350.

The product of its digits is 311040, while the sum is 49.

The square root of 698589121 is about 26430.8365550544. The cubic root of 698589121 is about 887.3070647457.

The spelling of 698589121 in words is "six hundred ninety-eight million, five hundred eighty-nine thousand, one hundred twenty-one".