698770609 has 4 divisors (see below), whose sum is σ = 707189616. Its totient is φ = 690351604.

The previous prime is 698770607. The next prime is 698770651. The reversal of 698770609 is 906077896.

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 698770609 - 2¹ = 698770607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698770607) 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, 4209379 + ... + 4209544.

It is an arithmetic number, because the mean of its divisors is an integer number (176797404).

Almost surely, 2^698770609 is an apocalyptic number.

It is an amenable number.

698770609 is a deficient number, since it is larger than the sum of its proper divisors (8419007).

698770609 is an equidigital number, since it uses as much as digits as its factorization.

698770609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8419006.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 698770609 is about 26434.2695946001. The cubic root of 698770609 is about 887.3838965755.

The spelling of 698770609 in words is "six hundred ninety-eight million, seven hundred seventy thousand, six hundred nine".