698638149 has 24 divisors (see below), whose sum is σ = 1137671360. Its totient is φ = 423415080.

The previous prime is 698638123. The next prime is 698638177. The reversal of 698638149 is 941836896.

698638149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 698638149 - 2⁵ = 698638117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 698638095 and 698638104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698631149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103657 + ... + 110190.

Almost surely, 2^698638149 is an apocalyptic number.

It is an amenable number.

698638149 is a deficient number, since it is larger than the sum of its proper divisors (439033211).

698638149 is a wasteful number, since it uses less digits than its factorization.

698638149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213878 (or 213861 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 698638149 is about 26431.7640160471. The cubic root of 698638149 is about 887.3278217600.

The spelling of 698638149 in words is "six hundred ninety-eight million, six hundred thirty-eight thousand, one hundred forty-nine".