91516097 has 4 divisors (see below), whose sum is σ = 93463296. Its totient is φ = 89568900.

The previous prime is 91516093. The next prime is 91516099. The reversal of 91516097 is 79061519.

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: 79061519 = 173 ⋅457003.

It is a cyclic number.

It is not a de Polignac number, because 91516097 - 2² = 91516093 is a prime.

It is a super-2 number, since 2×91516097² = 16750392020226818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91516097.

It is not an unprimeable number, because it can be changed into a prime (91516093) 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 3 ways as a sum of consecutive naturals, for example, 973529 + ... + 973622.

It is an arithmetic number, because the mean of its divisors is an integer number (23365824).

Almost surely, 2^91516097 is an apocalyptic number.

It is an amenable number.

91516097 is a deficient number, since it is larger than the sum of its proper divisors (1947199).

91516097 is a wasteful number, since it uses less digits than its factorization.

91516097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947198.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 91516097 is about 9566.4046015209. The cubic root of 91516097 is about 450.6428622507.

The spelling of 91516097 in words is "ninety-one million, five hundred sixteen thousand, ninety-seven".