91749547353 has 4 divisors (see below), whose sum is σ = 122332729808. Its totient is φ = 61166364900.

The previous prime is 91749547303. The next prime is 91749547429. The reversal of 91749547353 is 35374594719.

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.

It is not a de Polignac number, because 91749547353 - 2⁶ = 91749547289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91749547293 and 91749547302.

It is not an unprimeable number, because it can be changed into a prime (91749547303) 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, 15291591223 + ... + 15291591228.

It is an arithmetic number, because the mean of its divisors is an integer number (30583182452).

Almost surely, 2^91749547353 is an apocalyptic number.

It is an amenable number.

91749547353 is a deficient number, since it is larger than the sum of its proper divisors (30583182455).

91749547353 is a wasteful number, since it uses less digits than its factorization.

91749547353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30583182454.

The product of its digits is 14288400, while the sum is 57.

The spelling of 91749547353 in words is "ninety-one billion, seven hundred forty-nine million, five hundred forty-seven thousand, three hundred fifty-three".