698998961 has 4 divisors (see below), whose sum is σ = 735788400. Its totient is φ = 662209524.

The previous prime is 698998837. The next prime is 698998967. The reversal of 698998961 is 169899896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 698998961 - 2²² = 694804657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698998967) 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, 18394691 + ... + 18394728.

It is an arithmetic number, because the mean of its divisors is an integer number (183947100).

Almost surely, 2^698998961 is an apocalyptic number.

It is an amenable number.

698998961 is a deficient number, since it is larger than the sum of its proper divisors (36789439).

698998961 is a wasteful number, since it uses less digits than its factorization.

698998961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36789438.

The product of its digits is 15116544, while the sum is 65.

The square root of 698998961 is about 26438.5884835027. The cubic root of 698998961 is about 887.4805490943.

The spelling of 698998961 in words is "six hundred ninety-eight million, nine hundred ninety-eight thousand, nine hundred sixty-one".