689772691 has 8 divisors (see below), whose sum is σ = 720087840. Its totient is φ = 659484672.

The previous prime is 689772641. The next prime is 689772697. The reversal of 689772691 is 196277986.

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 689772691 - 2¹³ = 689764499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689772697) 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, 58771 + ... + 69523.

It is an arithmetic number, because the mean of its divisors is an integer number (90010980).

Almost surely, 2^689772691 is an apocalyptic number.

689772691 is a deficient number, since it is larger than the sum of its proper divisors (30315149).

689772691 is a wasteful number, since it uses less digits than its factorization.

689772691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13565.

The product of its digits is 2286144, while the sum is 55.

The square root of 689772691 is about 26263.5239638553. The cubic root of 689772691 is about 883.5585463804.

The spelling of 689772691 in words is "six hundred eighty-nine million, seven hundred seventy-two thousand, six hundred ninety-one".