698640935 has 4 divisors (see below), whose sum is σ = 838369128. Its totient is φ = 558912744.

The previous prime is 698640931. The next prime is 698640961. The reversal of 698640935 is 539046896.

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

It is a cyclic number.

It is not a de Polignac number, because 698640935 - 2² = 698640931 is a prime.

It is a super-3 number, since 3×698640935³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698640931) 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, 69864089 + ... + 69864098.

It is an arithmetic number, because the mean of its divisors is an integer number (209592282).

Almost surely, 2^698640935 is an apocalyptic number.

698640935 is a deficient number, since it is larger than the sum of its proper divisors (139728193).

698640935 is a wasteful number, since it uses less digits than its factorization.

698640935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139728192.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 698640935 is about 26431.8167177362. The cubic root of 698640935 is about 887.3290012413.

The spelling of 698640935 in words is "six hundred ninety-eight million, six hundred forty thousand, nine hundred thirty-five".