91103621097 has 8 divisors (see below), whose sum is σ = 125389930240. Its totient is φ = 58776529680.

The previous prime is 91103621093. The next prime is 91103621131. The reversal of 91103621097 is 79012630119.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91103621097 - 2² = 91103621093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91103621093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489804322 + ... + 489804507.

It is an arithmetic number, because the mean of its divisors is an integer number (15673741280).

Almost surely, 2^91103621097 is an apocalyptic number.

It is an amenable number.

91103621097 is a deficient number, since it is larger than the sum of its proper divisors (34286309143).

91103621097 is a wasteful number, since it uses less digits than its factorization.

91103621097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979608863.

The product of its (nonzero) digits is 20412, while the sum is 39.

The spelling of 91103621097 in words is "ninety-one billion, one hundred three million, six hundred twenty-one thousand, ninety-seven".