691861441 has 8 divisors (see below), whose sum is σ = 717305600. Its totient is φ = 666612720.

The previous prime is 691861411. The next prime is 691861453. The reversal of 691861441 is 144168196.

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 691861441 - 2⁹ = 691860929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 691861394 and 691861403.

It is not an unprimeable number, because it can be changed into a prime (691861411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41631 + ... + 55828.

It is an arithmetic number, because the mean of its divisors is an integer number (89663200).

Almost surely, 2^691861441 is an apocalyptic number.

It is an amenable number.

691861441 is a deficient number, since it is larger than the sum of its proper divisors (25444159).

691861441 is a wasteful number, since it uses less digits than its factorization.

691861441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97719.

The product of its digits is 41472, while the sum is 40.

The square root of 691861441 is about 26303.2591326626. The cubic root of 691861441 is about 884.4495032623.

The spelling of 691861441 in words is "six hundred ninety-one million, eight hundred sixty-one thousand, four hundred forty-one".