691076161 has 8 divisors (see below), whose sum is σ = 693712448. Its totient is φ = 688446000.

The previous prime is 691076159. The next prime is 691076171. The reversal of 691076161 is 161670196.

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 691076161 - 2¹ = 691076159 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 691076161.

It is not an unprimeable number, because it can be changed into a prime (691076171) 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, 376516 + ... + 378346.

It is an arithmetic number, because the mean of its divisors is an integer number (86714056).

Almost surely, 2^691076161 is an apocalyptic number.

It is an amenable number.

691076161 is a deficient number, since it is larger than the sum of its proper divisors (2636287).

691076161 is a wasteful number, since it uses less digits than its factorization.

691076161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 691076161 is about 26288.3274667675. The cubic root of 691076161 is about 884.1147524947.

The spelling of 691076161 in words is "six hundred ninety-one million, seventy-six thousand, one hundred sixty-one".