697109691 has 8 divisors (see below), whose sum is σ = 969891840. Its totient is φ = 444533672.

The previous prime is 697109683. The next prime is 697109747. The reversal of 697109691 is 196901796.

697109691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 697109691 - 2³ = 697109683 is a prime.

It is a super-2 number, since 2×697109691² = 971923842572230962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 697109691.

It is not an unprimeable number, because it can be changed into a prime (697109291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5051451 + ... + 5051588.

It is an arithmetic number, because the mean of its divisors is an integer number (121236480).

Almost surely, 2^697109691 is an apocalyptic number.

697109691 is a deficient number, since it is larger than the sum of its proper divisors (272782149).

697109691 is a wasteful number, since it uses less digits than its factorization.

697109691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103065.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 697109691 is about 26402.8349046083. The cubic root of 697109691 is about 886.6802602328.

It can be divided in two parts, 69710 and 9691, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 697109691 in words is "six hundred ninety-seven million, one hundred nine thousand, six hundred ninety-one".