91102047 has 8 divisors (see below), whose sum is σ = 122605056. Its totient is φ = 60166872.

The previous prime is 91102043. The next prime is 91102049. The reversal of 91102047 is 74020119.

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

It is not a de Polignac number, because 91102047 - 2² = 91102043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91102043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141583 + ... + 142224.

It is an arithmetic number, because the mean of its divisors is an integer number (15325632).

Almost surely, 2^91102047 is an apocalyptic number.

91102047 is a deficient number, since it is larger than the sum of its proper divisors (31503009).

91102047 is a wasteful number, since it uses less digits than its factorization.

91102047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283917.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 91102047 is about 9544.7392316396. The cubic root of 91102047 is about 449.9622141112.

The spelling of 91102047 in words is "ninety-one million, one hundred two thousand, forty-seven".