973691 has 2 divisors, whose sum is σ = 973692. Its totient is φ = 973690.

The previous prime is 973681. The next prime is 973727. The reversal of 973691 is 196379.

It is a weak prime.

It is an emirp because it is prime and its reverse (196379) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-973691 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (973631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486845 + 486846.

It is an arithmetic number, because the mean of its divisors is an integer number (486846).

2⁹⁷³⁶⁹¹ is an apocalyptic number.

973691 is a deficient number, since it is larger than the sum of its proper divisors (1).

973691 is an equidigital number, since it uses as much as digits as its factorization.

973691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 973691 is about 986.7578223658. The cubic root of 973691 is about 99.1152282094.

The spelling of 973691 in words is "nine hundred seventy-three thousand, six hundred ninety-one".