691098713 has 8 divisors (see below), whose sum is σ = 698990880. Its totient is φ = 683222400.

The previous prime is 691098673. The next prime is 691098731. The reversal of 691098713 is 317890196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691098713 - 2¹⁸ = 690836569 is a prime.

It is a super-2 number, since 2×691098713² = 955234862220512738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691098013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98558 + ... + 105336.

It is an arithmetic number, because the mean of its divisors is an integer number (87373860).

Almost surely, 2^691098713 is an apocalyptic number.

It is an amenable number.

691098713 is a deficient number, since it is larger than the sum of its proper divisors (7892167).

691098713 is a wasteful number, since it uses less digits than its factorization.

691098713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7927.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 691098713 is about 26288.7563988866. The cubic root of 691098713 is about 884.1243695433.

The spelling of 691098713 in words is "six hundred ninety-one million, ninety-eight thousand, seven hundred thirteen".