91002196 has 12 divisors (see below), whose sum is σ = 161173152. Its totient is φ = 44952728.

The previous prime is 91002193. The next prime is 91002209. The reversal of 91002196 is 69120019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91002193) 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, 136720 + ... + 137383.

It is an arithmetic number, because the mean of its divisors is an integer number (13431096).

Almost surely, 2^91002196 is an apocalyptic number.

It is an amenable number.

91002196 is a deficient number, since it is larger than the sum of its proper divisors (70170956).

91002196 is a wasteful number, since it uses less digits than its factorization.

91002196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274190 (or 274188 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 91002196 is about 9539.5071151501. The cubic root of 91002196 is about 449.7977626228.

The spelling of 91002196 in words is "ninety-one million, two thousand, one hundred ninety-six".