698090399 has 4 divisors (see below), whose sum is σ = 698155080. Its totient is φ = 698025720.

The previous prime is 698090377. The next prime is 698090417. The reversal of 698090399 is 993090896.

698090399 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 brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 698090399 - 2⁸ = 698090143 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 698090399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698090339) 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, 11804 + ... + 39185.

It is an arithmetic number, because the mean of its divisors is an integer number (174538770).

Almost surely, 2^698090399 is an apocalyptic number.

698090399 is a deficient number, since it is larger than the sum of its proper divisors (64681).

698090399 is a wasteful number, since it uses less digits than its factorization.

698090399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64680.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 698090399 is about 26421.4003981621. The cubic root of 698090399 is about 887.0958653023.

It can be divided in two parts, 6980 and 90399, that added together give a palindrome (97379).

The spelling of 698090399 in words is "six hundred ninety-eight million, ninety thousand, three hundred ninety-nine".