698000991 has 16 divisors (see below), whose sum is σ = 962515968. Its totient is φ = 449467200.

The previous prime is 698000981. The next prime is 698000999. The reversal of 698000991 is 199000896.

It is not a de Polignac number, because 698000991 - 2¹¹ = 697998943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698000999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44011 + ... + 57731.

It is an arithmetic number, because the mean of its divisors is an integer number (60157248).

Almost surely, 2^698000991 is an apocalyptic number.

698000991 is a deficient number, since it is larger than the sum of its proper divisors (264514977).

698000991 is a wasteful number, since it uses less digits than its factorization.

698000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14302.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 698000991 is about 26419.7083821907. The cubic root of 698000991 is about 887.0579920539.

The spelling of 698000991 in words is "six hundred ninety-eight million, nine hundred ninety-one", and thus it is an aban number.