91068693 has 4 divisors (see below), whose sum is σ = 121424928. Its totient is φ = 60712460.

The previous prime is 91068689. The next prime is 91068697. The reversal of 91068693 is 39686019.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39686019 = 3 ⋅13228673.

It is an interprime number because it is at equal distance from previous prime (91068689) and next prime (91068697).

It is a cyclic number.

It is not a de Polignac number, because 91068693 - 2² = 91068689 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91068697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15178113 + ... + 15178118.

It is an arithmetic number, because the mean of its divisors is an integer number (30356232).

Almost surely, 2^91068693 is an apocalyptic number.

It is an amenable number.

91068693 is a deficient number, since it is larger than the sum of its proper divisors (30356235).

91068693 is a wasteful number, since it uses less digits than its factorization.

91068693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30356234.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 91068693 is about 9542.9918264662. The cubic root of 91068693 is about 449.9072944831.

The spelling of 91068693 in words is "ninety-one million, sixty-eight thousand, six hundred ninety-three".