91000909102 has 16 divisors (see below), whose sum is σ = 140035738032. Its totient is φ = 44336272320.

The previous prime is 91000909091. The next prime is 91000909133. The reversal of 91000909102 is 20190900019.

It is a congruent number.

It is an unprimeable number.

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, 3472503 + ... + 3498610.

It is an arithmetic number, because the mean of its divisors is an integer number (8752233627).

Almost surely, 2^91000909102 is an apocalyptic number.

91000909102 is a deficient number, since it is larger than the sum of its proper divisors (49034828930).

91000909102 is a wasteful number, since it uses less digits than its factorization.

91000909102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971283.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 91000909102 in words is "ninety-one billion, nine hundred nine thousand, one hundred two".