698078249 has 4 divisors (see below), whose sum is σ = 761539920. Its totient is φ = 634616580.

The previous prime is 698078239. The next prime is 698078273. The reversal of 698078249 is 942870896.

698078249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 698078249 - 2²⁰ = 697029673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 698078249.

It is not an unprimeable number, because it can be changed into a prime (698078239) 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, 31730819 + ... + 31730840.

It is an arithmetic number, because the mean of its divisors is an integer number (190384980).

Almost surely, 2^698078249 is an apocalyptic number.

It is an amenable number.

698078249 is a deficient number, since it is larger than the sum of its proper divisors (63461671).

698078249 is a wasteful number, since it uses less digits than its factorization.

698078249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63461670.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 698078249 is about 26421.1704699092. The cubic root of 698078249 is about 887.0907187495.

The spelling of 698078249 in words is "six hundred ninety-eight million, seventy-eight thousand, two hundred forty-nine".