698236609 has 4 divisors (see below), whose sum is σ = 797984704. Its totient is φ = 598488516.

The previous prime is 698236573. The next prime is 698236613. The reversal of 698236609 is 906632896.

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 698236609 - 2¹³ = 698228417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698236639) 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, 49874037 + ... + 49874050.

It is an arithmetic number, because the mean of its divisors is an integer number (199496176).

Almost surely, 2^698236609 is an apocalyptic number.

It is an amenable number.

698236609 is a deficient number, since it is larger than the sum of its proper divisors (99748095).

698236609 is an equidigital number, since it uses as much as digits as its factorization.

698236609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99748094.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 698236609 is about 26424.1671391929. The cubic root of 698236609 is about 887.1577929231.

The spelling of 698236609 in words is "six hundred ninety-eight million, two hundred thirty-six thousand, six hundred nine".