698778375 has 64 divisors (see below), whose sum is σ = 1217728512. Its totient is φ = 355488000.

The previous prime is 698778361. The next prime is 698778391. The reversal of 698778375 is 573877896.

It is not a de Polignac number, because 698778375 - 2¹³ = 698770183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 722142 + ... + 723108.

It is an arithmetic number, because the mean of its divisors is an integer number (19027008).

Almost surely, 2^698778375 is an apocalyptic number.

698778375 is a deficient number, since it is larger than the sum of its proper divisors (518950137).

698778375 is a wasteful number, since it uses less digits than its factorization.

698778375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1063 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 60.

The square root of 698778375 is about 26434.4164868453. The cubic root of 698778375 is about 887.3871839670.

It can be divided in two parts, 698778 and 375, that added together give a triangular number (699153 = T₁₁₈₂).

The spelling of 698778375 in words is "six hundred ninety-eight million, seven hundred seventy-eight thousand, three hundred seventy-five".