691379085 has 8 divisors (see below), whose sum is σ = 1106206560. Its totient is φ = 368735504.

The previous prime is 691379047. The next prime is 691379089. The reversal of 691379085 is 580973196.

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 691379085 - 2⁶ = 691379021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691379089) 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, 23045955 + ... + 23045984.

It is an arithmetic number, because the mean of its divisors is an integer number (138275820).

Almost surely, 2^691379085 is an apocalyptic number.

It is an amenable number.

691379085 is a deficient number, since it is larger than the sum of its proper divisors (414827475).

691379085 is a wasteful number, since it uses less digits than its factorization.

691379085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46091947.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 691379085 is about 26294.0884040501. The cubic root of 691379085 is about 884.2439135869.

The spelling of 691379085 in words is "six hundred ninety-one million, three hundred seventy-nine thousand, eighty-five".