691614113 has 4 divisors (see below), whose sum is σ = 691669140. Its totient is φ = 691559088.

The previous prime is 691614103. The next prime is 691614139. The reversal of 691614113 is 311416196.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28654609 + 662959504 = 5353^2 + 25748^2 .

It is a cyclic number.

It is not a de Polignac number, because 691614113 - 2²² = 687419809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 691614113.

It is not an unprimeable number, because it can be changed into a prime (691614103) 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 3 ways as a sum of consecutive naturals, for example, 1631 + ... + 37227.

It is an arithmetic number, because the mean of its divisors is an integer number (172917285).

Almost surely, 2^691614113 is an apocalyptic number.

It is an amenable number.

691614113 is a deficient number, since it is larger than the sum of its proper divisors (55027).

691614113 is a wasteful number, since it uses less digits than its factorization.

691614113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55026.

The product of its digits is 3888, while the sum is 32.

The square root of 691614113 is about 26298.5572417956. The cubic root of 691614113 is about 884.3440991138.

The spelling of 691614113 in words is "six hundred ninety-one million, six hundred fourteen thousand, one hundred thirteen".