691683272953 has 8 divisors (see below), whose sum is σ = 728451194400. Its totient is φ = 654951705408.

The previous prime is 691683272911. The next prime is 691683272957. The reversal of 691683272953 is 359272386196.

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 691683272953 - 2²⁵ = 691649718521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 691683272891 and 691683272900.

It is not an unprimeable number, because it can be changed into a prime (691683272957) 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, 9049408 + ... + 9125521.

It is an arithmetic number, because the mean of its divisors is an integer number (91056399300).

Almost surely, 2^691683272953 is an apocalyptic number.

It is an amenable number.

691683272953 is a deficient number, since it is larger than the sum of its proper divisors (36767921447).

691683272953 is a wasteful number, since it uses less digits than its factorization.

691683272953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18176951.

The product of its digits is 29393280, while the sum is 61.

The spelling of 691683272953 in words is "six hundred ninety-one billion, six hundred eighty-three million, two hundred seventy-two thousand, nine hundred fifty-three".