691050097 has 8 divisors (see below), whose sum is σ = 695992320. Its totient is φ = 686125440.

The previous prime is 691050091. The next prime is 691050149. The reversal of 691050097 is 790050196.

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 691050097 - 2³ = 691050089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691050091) 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, 80272 + ... + 88462.

It is an arithmetic number, because the mean of its divisors is an integer number (86999040).

Almost surely, 2^691050097 is an apocalyptic number.

It is an amenable number.

691050097 is a deficient number, since it is larger than the sum of its proper divisors (4942223).

691050097 is a wasteful number, since it uses less digits than its factorization.

691050097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8783.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 691050097 is about 26287.8317287676. The cubic root of 691050097 is about 884.1036375324.

Subtracting 691050097 from its reverse (790050196), we obtain a palindrome (99000099).

The spelling of 691050097 in words is "six hundred ninety-one million, fifty thousand, ninety-seven".