698609239 has 4 divisors (see below), whose sum is σ = 700588656. Its totient is φ = 696629824.

The previous prime is 698609221. The next prime is 698609243. The reversal of 698609239 is 932906896.

It is a happy number.

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 698609239 - 2¹⁹ = 698084951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698609939) 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, 989179 + ... + 989884.

It is an arithmetic number, because the mean of its divisors is an integer number (175147164).

Almost surely, 2^698609239 is an apocalyptic number.

698609239 is a deficient number, since it is larger than the sum of its proper divisors (1979417).

698609239 is a wasteful number, since it uses less digits than its factorization.

698609239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979416.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 698609239 is about 26431.2171305069. The cubic root of 698609239 is about 887.3155822331.

The spelling of 698609239 in words is "six hundred ninety-eight million, six hundred nine thousand, two hundred thirty-nine".