698606878 has 4 divisors (see below), whose sum is σ = 1047910320. Its totient is φ = 349303438.

The previous prime is 698606849. The next prime is 698606903. The reversal of 698606878 is 878606896.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174651718 + ... + 174651721.

It is an arithmetic number, because the mean of its divisors is an integer number (261977580).

Almost surely, 2^698606878 is an apocalyptic number.

698606878 is a deficient number, since it is larger than the sum of its proper divisors (349303442).

698606878 is a wasteful number, since it uses less digits than its factorization.

698606878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349303441.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The square root of 698606878 is about 26431.1724673727. The cubic root of 698606878 is about 887.3145826498.

The spelling of 698606878 in words is "six hundred ninety-eight million, six hundred six thousand, eight hundred seventy-eight".