698409957 has 32 divisors (see below), whose sum is σ = 1077379072. Its totient is φ = 394196544.

The previous prime is 698409953. The next prime is 698409977. The reversal of 698409957 is 759904896.

698409957 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 698409957 - 2² = 698409953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 698409897 and 698409906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698409953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 818343 + ... + 819195.

It is an arithmetic number, because the mean of its divisors is an integer number (33668096).

Almost surely, 2^698409957 is an apocalyptic number.

It is an amenable number.

698409957 is a deficient number, since it is larger than the sum of its proper divisors (378969115).

698409957 is a wasteful number, since it uses less digits than its factorization.

698409957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 698409957 is about 26427.4470390161. The cubic root of 698409957 is about 887.2312037135.

It can be divided in two parts, 69840 and 9957, that added together give a palindrome (79797).

The spelling of 698409957 in words is "six hundred ninety-eight million, four hundred nine thousand, nine hundred fifty-seven".